Oil painting.The frame is also painted by the artist
"I have only painted one other nude and it was of one of my ex-wives and I sold it in a garage sale a few years ago. I'm sorry I did that."
The buttocks are the most aesthetically pleasing part of the body because they are non-functional. Although they conceal an essential orifice, these pointless globes are as near as the human form can ever come to abstract art. Kenneth Tynan