Well, I'm not much for reproduction, at this phase of my life, though the means of reproduction have a lot to recomend them...
Then there's digestion. That does come in handy, but it isn't too sexy.
Hmmm- actually, there's SO many.
Mmm, how about cognition?
Look, I'm going to come RIGHT back at you with that one.
What is your favorite bodily function?