Sex sells ... all over the animal kingdom. Females from numerous species use prostitution to get what they want -- and males are eager to pay up. Penguins pay for lurve with rocks, beetles offer nuptial gifts & chimps may bargain with a fruit or two ... For many animals, sex is all about the right transaction.
04:00 Spotted bonobos where there should be chimps? Never fear -- we know our apes! The chimp's frisky cousins made the cut because the clip made us laugh ... and let's face it -- they love their monkey business more. In terms of anatomical accuracy, we challenge you to find any noticeable difference in their private proportions: bit.ly/MHJU8h ; bit.ly/a1tQ0R