http://www.salonmagazine.com/it/feature/1999/03/cov_15featurea.html "A female ape wraps her legs around another female, 'rubbing her own clitoris against her partner's while emitting screams of enjoyment.' The researcher explains: It's a form of greeting behavior. Or reconciliation. Possibly food-exchange behavior. It's certainly not sex. Not lesbian sex. Not hot lesbian sex..." And the book, should you want to order it? "Bruce Bagemihl spent 10 years scouring the biological literature for data on alternative sexuality in animals to write 'Biological Exuberance: Animal Homosexuality and Natural Diversity,' 768 pages about exactly what goes on at "South Park's" Big Gay Al's Big Gay Animal Sanctuary."