The first time I tried anal sex I thought, wow, this is so totally different from pussy fucking! I mean it is soooo completely different from conventional fucking which is pleasurable from the start. Butt fucking is based on the pain/pleasure principal, at least from the female standpoint (I know, men love that tight little asshole!). For women it hurts like a motha at the beginning but as your muscles relax a little it starts to get super hot! Not like anything else I can think of. Not like an orgasm, not like oral sex. For me anyway, anal sex is what I think of as the dirtiest sex of all. It just feels soooo naughty!! And that may in fact be a large part of the turn-on. When I feel like indulging my extra nasty side, anal always fits the bill.