Well this had to come up sooner or later. The truth is, I don't know. the confusing thing about bonobos is that sex for them is a tension relevieng activity. So when they get tense, or anxious, they want to do some kind of sexual activity. this isn't sex, per se, but more of a rubbing.
there is, by the way, a nerve that goes straight from your brain to your genitals, so stress in your brain can manifest itself, you know... in lower areas. Actually when i was younger and i used to play the piano, horribly, so I was making mistakes all the time and getting very frustrated, I would actually feel physical pain in my nether regions.
i think this is how it is for bonobos. they want to be rubbed or soothed, base 1, rather than a home run.
so in summary, i think the come ons i've recieved from bonboos have been more like a handshake, a sort of hello how are you, no I don't mean you any harm. I've never heard of anyone having sex with a chimp or a bonobo, and yes i do find the idea a little disgusting.
having said that, here is Tatanga, who I am a little in love with, giving me a particularly sexy smile...