I know why I would'nt stick it in a man - mens' bodies just don't turn me on - simples ! Anal with a woman is a different matter. It's still a woman I'm fucking and women's bodies turn me on.
Getting back to the anal act itself. I like a bit of anal for several reasons. First is that that little brown star is usually much tighter than a pussy. OK, not as greasy and wet but tight. And that is nice. I also think that, sub-consciously , there is an element of humiliation going on, even if my partner likes it. Many of us are conditioned by society to think of anal sex as dirty ( which I suppose it is, given what comes out of an asshole ) and by engaging in anal, we are doing something perverted and taboo and, therefore humiliating to both parties, especially the woman. Maybe a power thing for the man. Ah, bugger this. You could analyse sexual behaviour from here to eternity and not come up answers. Better people than me have tried and failed.
So, here's a question : Do porn models take an enema before anal ? I know that when I have had anal, Little Dicky usually comes out with brown bits sticking to him. But it is rare that you see a porn model's cock with anything on it.
Now, I've got to head off to work but keep coming back.