In monkey world, males give meat, get sex

WASHINGTON: Human females may get offended at dates who expect a little something extra after they buy a steak dinner, but for chimpanzees, the exchange may be a fair one, German researchers reported on Tuesday.

They found that female chimpanzees mate more frequently with males who often share meat with them.

"Our results strongly suggest that wild chimpanzees exchange meat for sex, and do so on a long-term basis," Cristina Gomes of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany said in a statement.