Good topic. I've never been interested in doing it yet, but if she wanted it badly, I'd probably try it. With tons of moves you can do with the vag, it seems like it's pure fetish to go for the ass. I do play with the knot though, especially as she's coming. First time I did that, I got a "what the hell are you doing" reaction, but in a good way.
I was friends with a girl in high school who told me she took it up the chute, and said it "feels like taking a sh*t."
Here in this graveyard it's still No Man's Land
The countless white crosses in mute witness stand
To man's blind indifference to his fellow man
And a whole generation who were butchered and damned.