I've just thought - if most of us could get our heads between our legs, I don't think that it would be our asses (or as we would say in the UK - arses) that we'd be kissing.

I once heard Linda Smith (the comedienne not my partner) say that the human race wouldn't have got anywhere if they'd been able to suck their own genitals (mind you, I bet Spaw is going to claim he can).