It was with another guy that I've known for a long time, we're not in a romantic relationship, and I just asked him if he would do it cause I wanted to see what it felt like. I was kind of surprised at how matter-of-fact he was about it, but he's that kind of guy. Anyway, I had him go very slow with lots of lube but once he got all the way in and he was hitting what I guess was my prostate, it was amazing. I've never felt that before. Now I see what the big deal is. I didn't like it when he was pushing in and out, that was more uncomfortable. I just wanted him to stay in pressing against my prostate. Do other people like the in/out ass motion?