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Chimpanzees Exchange Meat For Sex

the_therapist writes "A team from the Max Planck Institute for Evolutionary Anthropology in Germany, studied chimps in the Tai Forest reserve in Ivory Coast and discovered that chimpanzees enter into 'deals' whereby they exchange meat for sex. Among the findings are that 'male chimps that are willing to share the proceeds of their hunting expeditions mate twice as often as their more selfish counterparts.' They also found this to be 'a long-term exchange, so males continue to share their catch with females when they are not fertile, copulating with them when they are.'"

48 of 313 comments (clear)

  1. Same behavior in humans too by grasshoppa · · Score: 5, Insightful

    We formulized it and called it marriage though.

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    1. Re:Same behavior in humans too by Anonymous Coward · · Score: 5, Funny

      Except the chimps don't seem to exhibit the signs of buyer's remorse.

    2. Re:Same behavior in humans too by Jangchub · · Score: 4, Insightful

      +5 funny? That's robbery. +5 insightful.

    3. Re:Same behavior in humans too by PachmanP · · Score: 5, Insightful

      We formulized it and called it marriage though.

      Nah men formalized it and called it prostitution. Women started thinking about how to get more and put out less and that's how we got marriage.

      --
      You're thinking small. Why miniaturize the laser, when we could instead enlarge the sharks? -John Searle
    4. Re:Same behavior in humans too by Gorobei · · Score: 5, Insightful

      Nah men formalized it and called it prostitution. Women started thinking about how to get more and put out less and that's how we got marriage.

      Actually, it was probably the other way around: men formalized marriage in an effort to stop women sleeping around. Stability of the tribe, and all that (alpha males still get to sleep around, beta males get a better chance of their kid actually being theirs, the rest have no illusions.)

      Sometimes I wish I could forget everything I've read on primate and avian mating patterns, it would make my life so much easier.

    5. Re:Same behavior in humans too by tverbeek · · Score: 4, Insightful

      ....and there is really only one reason to take a girl out on a date....

      Because otherwise it gets really boring at the restaurant waiting for your order to arrive?

      --
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    6. Re:Same behavior in humans too by Narpak · · Score: 3, Interesting

      Perhaps they created marriage to stop the spread of STDs. Maybe, back in the days, they tried the free sex approach and discovered that syphilis and others were a bit of a bitch. A free-sex society don't work quite as well if you don't have prevention like condoms available.

      Though as you mentioned, could also be that rulers insisted on monogamy from their mates to ensure that any offspring came from the right father. Always hard to confirm parentage if you don't have access to at least a basic lab.

    7. Re:Same behavior in humans too by fractoid · · Score: 3, Insightful

      Always hard to confirm parentage if you don't have access to at least a basic lab.

      Not if you trace maternal bloodlines.

      --
      Rampant carbon sequestration destroyed the Dinosaurs' tropical paradise. I'm here to help repair the damage.
    8. Re:Same behavior in humans too by Maxo-Texas · · Score: 5, Interesting

      Small tribes and isolation prevented any bad repercussions for free sex.

      In my 50 years of experience there are three types of women
      * Those who hate sex (common and really sad- seems to last decades)
      * Those who are extremely promiscuous (uncommon but more common than you think)
      * Those who enjoy sex and are reasonably or totally monogamous (uncommonly for a decade, rare for a lifetime)

      Based on actual experience, if you are not afraid of loss, the best partner is a couple days a week and then the rest of the time you do guy stuff. A full time wife/girlfriend can be stifling unless you make them your life. I've done it both ways multiple times. I prefer the fwb and free time. Since I have extra meat to share, it works. I've been in three ~decade long relationships and ended up gutted emotionally every time. After I quit that, I was much happier. But I do envy friends who made it work. Having a girlfriend, then wife from 16 to 26 was probably awesome and changed me since I never did the club hunting thing. But it was stupid to marry before I was on good financial footing. And once you marry/get a girlfriend, you can't do what you have to do to get set financially.

      If I was religious, it would have been a lot easier. Religious girls *will* drop you after you and they are in in love-- because a) god comes first and b) "they are going to be in heaven alone for eternity while you are in hell and it makes them sad."

      Worldwide (citation needed but exists), women leave men at a higher rate when the last born child reaches 5 years old. Regardless of culture, religion, or other factors. The theory was that genetically that is when the child can gather it's own food and walk around and there is something genetic about it. And that it is better to have children by multiple mates in order to maximize the odds your genes survive (for both sexes- but they use different strategies to achieve the goal-- I've read up to 10% of children's dna do not match their fathers in many areas, so that's another strategy- happened to at least one friend of mine).

      The only problem is the damn legal system currently punishes men way out of proportion. I've even heard of men required to pay child support for children that were not theirs (they'd paid for a couple years and THEN found out the ex had been lying-- so do a quick paternity test when your wife asks for a divorce and save yourself some grief).

      We all want to love and be loved in return-- and really, almost completely separate from that we want red hot noogie. In fact, the argument over who should take out the garbage gets in the way which is why some of the most incredible sex is with people you only see to get it on with. But (in my experience), you still have to know them well- the anonymous stuff never worked for me. Too cold.

      --
      She was like chocolate when she drank... semi-sweet at first and then increasingly bitter.
    9. Re:Same behavior in humans too by Gorobei · · Score: 3, Insightful

      Doubtful on the STDs: most animals use the "free sex approach" with minimal effect on fertility (actually, if an STD makes individuals infertile, that encourages sex with multiple partners.) Also, small breeding populations are not much affected by STDs: everyone is exposed, virulence is low. STDs go wild once you have big cities and travel (jets, wars, or pilgrimages, etc.)

    10. Re:Same behavior in humans too by martinX · · Score: 3, Funny

      My theory was that marriage was invented by mobs of ugly men. Or maybe by alpha males that were just plain shagged out and wanted a reason to cut down on the number of wives.

      Either way, it works for me!

      --
      When they came for the communists, I said "He's next door. Take him away. Goddam commies."
    11. Re:Same behavior in humans too by YttriumOxide · · Score: 5, Insightful

      and there is really only one reason to take a girl out on a date....

      It's comments like this that lend a strong argument as to why the stereotype of geeks never having girlfriends exists. Sex is great, and I enjoy it immensely, but I'd never consider it the "one reason" to be with a girl. It's great to share your thoughts with someone, have them share theirs with you; someone to laugh with, cry with; someone to look after you when you need it and give you the chance to look after them when they need it. My compatibility with a girl on ALL of these things is what I'm looking for when I go on a date with a girl, not just whether she'll put out at the end of the night.

      --
      My book about LSD and Self-Discovery
      Also on facebook as: DroppingAcidDaleBewan
    12. Re:Same behavior in humans too by troll8901 · · Score: 5, Funny

      and there is really only one reason to take a girl out on a date....

      To bribe them to set you up with another girl?

    13. Re:Same behavior in humans too by F34nor · · Score: 3, Funny

      A slut sleeps with everyone, a bitch sleeps with everyone but you.

    14. Re:Same behavior in humans too by kklein · · Score: 3, Insightful

      I've read up to 10% of children's dna do not match their fathers in many areas, so that's another strategy- happened to at least one friend of mine

      Ugh, I can't say anything, but I really suspect this has happened with my brother's youngest. His wife got weird about the time he was born and then left him a little over a year later, out of the blue. The kid doesn't look like anyone on our side of the family, and has personality traits (like athletic ability) that neither side has. She cheated on him a bunch of times while they were dating, and then twice (that we know of) since they got married (they are, of course, divorcing now).

      It's rough because, emotionally, he's already a wreck, and he has done most of the raising of the youngest and is a very proud parent. We all love that kid to death. But still... I just don't think he's "one of us."

      I've decided to keep my mouth shut. Kid needs a family no matter what, and we like having him around. He shouldn't be punished for his mom being a dumb slut.

    15. Re:Same behavior in humans too by cayenne8 · · Score: 3, Interesting
      "As to the subject at matter...is this really surprising??

      Quite often I've taken dates out to a nice steak dinner....and there is really only one reason to take a girl out on a date....

      As for marriage...dude, you never marry them, it cost you half your shit when you want to upgrade to a newer model."

      Wow...modded to hell.

      Hehehehe...I guess there are many more women lurking around slashdot than we originally thought.

      --
      Light travels faster than sound. This is why some people appear bright until you hear them speak.........
    16. Re:Same behavior in humans too by EmotionToilet · · Score: 5, Funny

      Hehehehe...I guess there are many more women lurking around slashdot than we originally thought.

      You mean there are two!?!?

    17. Re:Same behavior in humans too by sharp-bang · · Score: 4, Funny

      It's comments like this that lend a strong argument as to why the stereotype of geeks missing the punchline exists.

      --
      #!
    18. Re:Same behavior in humans too by commodore64_love · · Score: 4, Funny

      That's because they keep their women silent.

      Or maybe it's because female chimps are satisfied with what they have, instead of constantly demanding more and more like little bitchy princesses! (sigh). No I'm not bitter. I just have this gnawing pain in my gut until I can feel the bile rising-up into my mouth. Or maybe it's just indigestion. Anyone have a tic-tac?

      --
      "I disapprove of what you say, but I will defend to the death your right to say it." - historian Evelyn Beatrice Hall
    19. Re:Same behavior in humans too by ErkDemon · · Score: 4, Funny

      And in breaking news, researchers have discovered that rich guys who regularly walk into bars and buy everyone drinks tend to make more friends, be surrounded by more friendly women, and consequently seem to get laid more often than those lone researchers who sit all alone in the darkest, emptiest corner of the bar all night clutching a single drink and taking research notes for their anthropology thesis without actually ever talking to anybody or even making eye contact - Dammit.

    20. Re:Same behavior in humans too by jacqdesign · · Score: 3, Insightful

      I can't resist making a comment... I think your comment is actually an example of why geeks don't have a girlfriend. A non geeks requirements for a girl are far less. Will they have sex with me? Yes. Do I want to have sex with them? Yes. Boom they got a girlfriend. Meanwhile here you are, the geek, wanting a girl to do that and have thoughts to share, similar sense of humor, to take care of you etc. That's a much longer requirement list to have out of the gate.

      Having said that, your approach is probably the more rational one by far, and more satisfying when you do get the girlfriend, but geeks go for quality, not quantity. Non geeks, it's all about quantity till you hopefully find that quality.

      I wanted to comment with something funny about how I have tried to buy many women a good steak dinner for that same reason, but somehow evolution clearly affected women faster then it did me. I kept trying, not very many women were buying. Sometimes evolution sucks.

  2. Wow by mc1138 · · Score: 4, Funny

    I need to head to the closest butchers shop!

    1. Re:Wow by schon · · Score: 3, Funny

      I need to head to the closest butchers shop!

      First, you might want to make sure that zoophilia isn't illegal in your state. :)

    2. Re:Wow by Chris+Burke · · Score: 4, Funny

      I need to head to the closest butchers shop!

      Before you drop too much on premium cuts, remember the article said the ones who gave meat gifts had twice as much sex. You might want to think about how much you have now and do the math before deciding if that's worth it. ;)

      --

      The enemies of Democracy are
  3. Hmm by EkriirkE · · Score: 5, Funny

    I'd rather use MY meat for sex.

    --
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    to 45 2F 6E 40 3C DF 10 71 4E 41 DF AA 25 7D 31 3F
  4. Obligatory by Anonymous Coward · · Score: 4, Funny

    Is that a banana in your pocket or are you just happy to see me?

  5. I wonder how well this would work.... by Daemonax · · Score: 3, Funny

    There is a vegetarian girl that I'm interested in. I wonder if I'd get sex in exchange for an offering of meat?

  6. NOT News . . . seen Bonobos by Mr.Ziggy · · Score: 5, Informative

    This behavior has been quite well documented in bonobos, which until recently were considered chimps or dwarf chimps. I'm not sure what makes this article newsworthy, except that we all like to read about meat and sex...

    Try reading a copy of "The Hunting Ape" by Stanford... It's fascinating in covering hunting and culture in apes (including trading food for sex).

    From what I've read, I'd also disagree with the article that meat is so valuable to their diet. They LOVE meat, but other research suggests that the amount of energy expended on hunting compared to what they gain in protein/food is a net negative. Hunting is also high risk and includes getting injured in the process.

    1. Re:NOT News . . . seen Bonobos by khallow · · Score: 4, Interesting

      From what I've read, I'd also disagree with the article that meat is so valuable to their diet. They LOVE meat, but other research suggests that the amount of energy expended on hunting compared to what they gain in protein/food is a net negative. Hunting is also high risk and includes getting injured in the process.

      If they're using meat as a currency for reproduction, then it becomes a very valuable part of the diet. And supplying meat sounds just like the typical display of fitness ritual common to many animals' reproductive behavior.

    2. Re:NOT News . . . seen Bonobos by martinX · · Score: 3, Funny

      I thought being high up in the chess club was a worthy display of prowess. Seems it wasn't. Who knew?

      --
      When they came for the communists, I said "He's next door. Take him away. Goddam commies."
  7. I thought sex WAS the exchange of meat... by GodfatherofSoul · · Score: 5, Funny

    ...at a high rate of give and take.

    --
    I swear to God...I swear to God! That is NOT how you treat your human!
  8. Bonobos by Chris+Burke · · Score: 5, Interesting

    I can believe this is a new discovery for the Common Chimpanzee. But for their close relatives the Bonobos, I saw documentaries decades ago showing not just the long term pair-bonding/mating-behavior related food-giving described in TFA, but outright prostitution. As in a male chimp comes up to a female with a banana in his hand, kinda tugs on her, she reacts neutrally, he hands her the banana and tugs again, they go off and have sex. And lest you hold on to the notion that this was still mating-related behavior, the sex in question was oral.

    Ah, Bonobos. Gotta love those crazy nympho primates. I could be wrong but I think the Common Chimp is closer to us genetically, but I think the Bonobo is closer to us psychologically. I was going to say socially, but I don't know many human societies where genital rubbing is used as a greeting or where orgies break out whenever they acquire food.

    --

    The enemies of Democracy are
    1. Re:Bonobos by suricatta · · Score: 5, Funny

      If you ever find such a human society, can you let us know? Thanks.

    2. Re:Bonobos by yali · · Score: 5, Interesting

      male chimp comes up to a female with a banana in his hand, kinda tugs on her, she reacts neutrally, he hands her the banana and tugs again, they go off and have sex.

      Part of what's new about this finding is that the chimpanzees are engaging in a long-term exchange, not just an instantaneous trade like in your bonobo example. The male chimp gives the female some meat now, and at some point later in time she mates with him.

      This is interesting because the ability to engage in long-term exchanges requires some pretty sophisticated cognitive machinery that isn't necessary for an instantaneous trade. You have to keep track of who you have active deals with and what the running balance is, and you have to be sensitive to cheaters (and have an effective response, like ostracizing them) lest you get exploited. Evolutionary psychologists think that humans have special cognitive adaptations to help us manage long-term exchanges. This study appears to present evidence of similar abilities in other primates.

  9. Oldest profession? by Anenome · · Score: 3, Insightful

    Damn, we call it the 'oldest profession' and had no idea just how far back it went :P

    --
    "I Don't Have Enough Faith to be an Atheist"
    1. Re:Oldest profession? by adavies42 · · Score: 3, Interesting

      actually there was an article last year about some researchers who taught chimps to use money (plastic "task reward" tokens exchangeable for food). they promptly invented prostitution.

      --
      Media that can be recorded and distributed can be recorded and distributed.
      -kfg
  10. And by shellster_dude · · Score: 3, Funny

    All the hottest chimps get fat. Seems like a bad system to me.

  11. They just have to very careful by memorycardfull · · Score: 4, Funny

    about exactly how they word their craigslist ad when they do it.

  12. Re:Damn by Anonymous Coward · · Score: 5, Funny

    Not living in their mom's basement.

  13. Isn't this survival of the fittest? by Anonymous Coward · · Score: 3, Insightful

    It seems an objective way to see if a potential mate has the capability of bringing home the bacon (sorry for the pun), thereby being a good indicator on whether the male could provide for a family that would result from copulation (unless they have safe sex ;) ).
    If the male chimp doesn't have enough to share, he isn't probably very good at getting food - and you wouldn't want to propagate those genes. Did they check whether the chimps that shared the most also gathered the most?
    So why is it being made to sound like prostitution, when it clearly is more like survival of the fittest - the female bangs the best male?

  14. Not new by vadim_t · · Score: 5, Interesting

    There was an article some years ago about monkeys (not sure if chimpanzees or not) being trained to use money.

    Researchers taught them that discs of metal could be exchanged for food and such things. They got all sorts of interesting behaviors out of it, including the monkeys attempting to fake the money.

    One uncomfortable discovery was discovering that some of them were actually using that money to pay for sex.

    This seems even better than this one. Food for sex is a straightforward exchange. Tokens that can be used to obtain food for sex is more complicated, and shows a deeper understanding.

    1. Re:Not new by Rabbitbunny · · Score: 5, Informative
  15. I always laugh.... by WindBourne · · Score: 3, Interesting

    when ppl speak of women putting out so little. Back in my 20s and 30s, most of the women that I dated wanted sex every night (a couple pushed for sex 2-3x a day) and gripped that the guys that they used to date were horrible in bed. They said that they quit putting out because THEY were not getting satisfaction. It was even more so with divorced women. I suspect that more guys need to change.

    --
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    1. Re:I always laugh.... by Maxo-Texas · · Score: 4, Interesting

      A woman whose body works well (no endometriosis, abuse issues, etc.) can climax every 2 to 3 minutes for an indefinite period.
      The best a man can do is either edge forever, or train themselves to climax without ejaculation (came close but never succeeded myself but some do).

      One huge piece of advice... get a massage table ($300). So much better than a bed. Soooooo much better than a bed.
      You can adjust the height by inches (so you hit the right spots inside her) and instead of doing push-ups (every frikkin muscle in the body except the inner ear) for an hour, you are only screwing (so mainly abs, gluts and triceps). It is marvelous for all parties concerned.

      Because of our weak egos, ladies do well who push those buttons. I can see when they are pushing my buttons and it still feels good.
      Ladies in their 40's who didn't have something go wrong, like sex as much or more than younger women. I was married and monogamous most of my 20's so I don't have a lot of comparison in that age. In my 30's they wanted sex but a lot seemed to be screwed up by their previous relationships. In their 40's they knew what they wanted and went for it. I wonder what the 50's and 60's will be like.

      --
      She was like chocolate when she drank... semi-sweet at first and then increasingly bitter.
  16. For human males, the key is to avoid Marriage trap by echtertyp · · Score: 3, Funny
    The BBC article is mostly interesting for how closely chimp behavior is to human behavior--who knew chimps were so much like us, socially?

    For us humans, the key thing (at least for males) is to avoid the marriage trap. Outside of marriage, the resources-for-nookie exchange holds true at market rates. Imbalances are corrected by the laws of microeconomics.

    But once locked in a marriage contract, a human male MUST provide resources under penalty of law, while the female is not obligated to do...anything. The predictable result is the epidemic of sexless marriages in the U.S. and other developed countries.

    So, just beware the marriage trap. It's like signing an oil futures contract where you're required to deliver oil at $12 a barrel, indefinitely. You'd be a fool to sign either a $12/bbl oil contract, or a marriage contract.

  17. Maybe it's not an EXCHANGE by Chienne+Folle · · Score: 5, Interesting

    I find it interesting that the author of the BBC article is assuming that the male chimps are trading meat for sex. The original article goes on to state that female chimps don't hunt, so they can't obtain meat on their own. When the male chimps donate meat to the female chimps, they don't just get more sex, they also increase the chances that the female chimp will take in enough protein and calories to bear a healthy baby.

    Humans look at the male chimp's giving the female chimp meat as "trading" meat for sex, but there are a lot of other constructions that could be put on that behavior. He could just as easily be trying to assure that his offspring will be healthy. Or trying to assure the health and well-being of a female that he's come to care about.

    The original article says that people had tried to find meat-for-sex exchanges in chimps before and failed, because they didn't give the animals enough credit for long-term planning. They looked to see if Chimp A gave meat to Chimp B, then had sex with her two minutes later, and they didn't find that. The current researchers succeeded because they took a longer-term view and counted meat-giving and sexual activity over time. But it's possible that they're still not giving the animals enough credit -- what if the meat-giving isn't trading meat for sex but is something else entirely?

    Observations of primate behavior will never tell us anything until we learn to just report what we see the animals doing, then think of every plausible reason why they might be doing that, rather than assuming that the animals aren't capable of doing what we do.

    --
    Middle-aged professional woman still plays computer games. Film at 11.
  18. Different behaviour by jd · · Score: 3, Informative

    The point of TFA is that outright prostitution does NOT exist. Giving meat does not produce results there and then and does not guarantee them in the future. It's not a pay-to-play deal.

    What is observed with chimps is something far more interesting, as it shows an awareness of delayed gratification on the part of the males and of long-term strategies by the females.

    Basically, meat is nutritionally high-value food compared to anything the females can get otherwise. This means that giving meat to the females improves the health and strength of the females. The female doesn't reward the male for the meat, but rather rewards the male for superior long-term care and support.

    In other words, it's not an exchange, nothing is being bartered, and no individual gift by either side is connected in any way to any individual gift by the other. Instead, it looks much closer to long-term strategies by both sides where a move might be planned weeks or months in advance.

    To compare chimps with bonobos is like comparing (theoretically intelligent) economists with stock market day-traders. I'd argue the chimps are actually smarter than economists, as chimps have fewer housing bubbles and the meat supply doesn't go bankrupt as often.

    For all the primitiveness of the exchange, this indicates an extremely high level of intelligence that is beyond a fairly large percent of the human population. Humans do NOT do well on delayed gratification.

    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
  19. Re:Plank institute? by Anonymous Coward · · Score: 3, Informative

    Max Planck Society is the basic research organization that exists parallel to the universities in Germany. Used to be called Kaiser Wilhelm Society but was renamed after the war.