Us geeks have our own Kama Sutra. I've tried quite a few of these before, especially the dominant butt-crack squat and captain Kirk's lust thrust. They are not as easy as it seems at first. It takes a lot of flexibility, strength and focus to get in there, if you know what I mean... ;-)
Let me know if you have tried some of these and if there are any more. I always enjoy trying new "positions"