Lucky Louie on butt sex:
http://www.youtube.com/watch?v=U0--sA5Ah74
I have to say I am a fan- but only if she is into it. Something forbidden and intimate. I still remember the first time a new girlfriend looked at me and said, "Can I make perverted request..."
Although my experience is in giving rather than receiving- I have introduced a few partners. Lost of going slow with toys to work up to an actual dick. Then lots of patience about how much, how fast and how hard. If it is not fun- then it is not safe.
And Sarahlynn- if a guy told you you have the perfect body for greek... all that means is that he wants it. No such thing. The greek goddess with the biggest appetite I ever met was small, thin and a tiny butt and loved it. Not that I am huge- but she had no size limitations that I know of and once we got going, loved it hard and fast. Like so many things in life- it is an acquired taste and takes patience and practice.