Heh heh. If this isn't proof of evolution, I don't know what is.
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"A new study found that male monkeys will give up their juice rewards in order to ogle pictures of female monkey's bottoms. The way the experiment was set up, the act is akin to paying for the images, the researchers say.
The rhesus macaque monkeys also splurged on photos of top-dog counterparts, the high-ranking primates. Maybe that's like you or me buying People magazine.
The research, which will be detailed in the March issue of Current Biology, gets more interesting.
The scientists actually had to pay these guys, in the form of extra juice, to get them to look at images of lower-ranking monkeys.
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The study, announced Friday, is far from monkey business. It was sponsored by the National Institute of Mental Health and the Cure Autism Now Foundation. The goal is to learn more about the social machinery of the brain with an eye toward helping autism patients."
http://www.livescience.com/animalworld/050128_monkey_business.html