1. 75% of the meat in a Chimpanzee's diet is baby red colobus monkey. The main purpose for eating these little guys? Sex. Researchers foud that if a male chip offers a freshly killed baby monkey to a female they will mate.
2. Only two species in the world mate face to face. Humans and bonobo monkeys. They mate face to face whenever other monkeys would fight... make love not war I guess.
3. Different families of Chimpanzees will engage in "Wars" with other families for territory and food. While in these wars the chimps will kill, eat, rape, pillage, and be as nasty as they can to the other family until one side gives up their land.