There's no question that it's an intimate act. I've fisted a few guys who absolutely love it. On one occasion he took it up almost to my shoulder, although in that particular case, I don't think I was the first to fist him that particular night. It was almost too easy. The thing that excites me is the velvety smoothness you feel, and the pulse you feel through your whole hand and arm when you're deep in there. Most guys I've fisted blow amazing loads in the midst of it. Feeling the tightening of the anus on your forearm is amazing. There's a lot of strength in those muscles. Then, you feel the guy totally relax after his climax, and the velvet smoothness is what you feel, in addition to his pulse slowing down! Lots of fun, but I don't think I could handle having it done to me.