The best I ever had was with a doll. I know there are life size dolls á la Lars and the Real Girl but this was with a children's doll. I don't have the doll anymore and have been looking for a replacement. It was fairly large as dolls go - about 30" tall. She was semi anatomically correct. I had to cut a hole so I could get inside her. It just happened that whatever she was stuffed with was the perfect consistency to produce the most intense orgasms I've ever known. I don't know what it was but it was not too hard and not too soft. It let me in every time but with enough resistance that I could feel my penis being pressured from all sides. And her "skin" was tight but not too tight. Not plastic and not rubber - I think vinyl. I could see my head moving inside her as the skin would bulge from the inside as I thrusted. She was a lot like the pic I've attached. Maybe the same, maybe not. It was years ago. Damn I'm hard right now just thinking about it. Anyone else have experience with dolls?