Why do chimpanzees have such ugly butts?

Its the female chimpanzees of reproductive age that have the swollen pink/red butts, during their fertile phase. read more

Most don’t KNOW they have ugly butts. So they don’t try to hide them. The ones who DO know, don’t care. The really smart ones know that YOU think they have ugly butts, so they turn their backs and back-ends on you, every time. And overall, they LIKE their butts, and so do their friends. read more

Of all the primates, humans have the biggest butts, because we stand erect and walk on two legs instead of using our arms. We need our over-developed gluteus maximi to be able to perform that feat. Now the female chimp has genital swelling during her heat period, which makes her external genitalia much more prominent. read more