The porn stars of the simian world have to be the bonobos....a chimp that lives in Congo mainly, but is different to your PG tips chimps, being extremely violent as well as insatiably horny.
http://i5.photobucket.com/albums/y154/Reg__Smeeton/Bonobo.jpg.....Sexual intercourse plays a major role in Bonobo society, being used as a greeting, a means of conflict resolution and post-conflict reconciliation, and as favors traded by the females in exchange for food. Bonobos are the only non-human apes to have been observed engaging in all of the following sexual activities: face-to-face genital sex (most frequently female-female, then male-female and male-male), tongue kissing, and oral sex. This happens within the immediate family as well as outside of it. Bonobos do not form permanent relationships with individual partners.