It seems, prostitution really is the oldest profession. In fact, we don’t seem to be nearly the only species who engages in the practice. So, it turns out, do our close evolutionary cousins, the Chimpanzes:
Chimpanzees enter into “deals” whereby they exchange meat for sex, according to researchers.
Male chimps that are willing to share the proceeds of their hunting expeditions mate twice as often as their more selfish counterparts.
This is a long-term exchange, so males continue to share their catch with females when they are not fertile, copulating with them when they are.