I don't do anal, unless the woman REALLY wants it. The vagina is SOO much better. Just not much room to get 6'' of girth in an un-stretched asshole. I don't understand why do many guys want to do anal so badly, with a woman.
There's at least two other places that I would consider much better places to put my penis, and that would be the vagina and her mouth...
Sometimes when a girl has a really big nice shaped butt, I have a desire to fuck it, but I'd still take the other two holes, first, unless she was begging me to put it in her ass. I don't think I'd ever push a girl into giving up anal.
If and when I fuck asses, it needs to be LUBED A LOT! You need to keep up on it, and go slow, which is easy because it's hard to go fast when I can barely fit.