When wanting to penetrate someone, are you not worried that the person in question has not wiped his backside during the last time he had took a dump so that your tool might end up smelling of poo-poo when you put it into that person?
From a perspective of health, I would worry. But it has, since at least my early teens, been a sort of philia of mine to have anal sex with a person soon after they've defecated, and then give them an ATM (ass-to-mouth). It wouldn't feel as exciting if the person wasn't reluctant or uninterested in licking their own feces off of my penis, either. It's just something about the degradation and humiliation of the whole act on that person's part that excites me. I've read up on the whys and wherefores of this fetish as well as what could've potentially inculcated it into me. Psychiatry surmises that my enjoyment of another person's consumption of feces (the consumption itself being called coprophilia) rather than my own rules out a mental illness. Rather, I've been told that it (among a plethora of other things, like the general enjoyment of another person's humiliation or pain) is indicative of a personality disorder–antisocial personality disorder. Such a diagnosis makes no sense, really. I've been given no explanation as to why these antisocial characteristics are solely sexual in nature, and do not manifest themselves in non-sexual ways. They're effectively proclaiming that I'm an occasional sociopath, which is malarkey and not possible. Sorry to all for going on such a tangent here, but perhaps anyone here can give me a more realistic answer than a fringe psychiatrist could?
After years of wiping shit from her ass one day Margaret says enough is enough, I'm never wiping my ass again.