When its playful I am okay with it. For me to be involved with it, the smaller guy has to take the initiative and set the boundaries. From a top point of view there is a reinforced control and power and a boosted confidence that someone is intimidated by you sexually. It is an odd rush - not one I seek, but one I've bumped into over the years. The first time was with a guy who was gay4pay who met me in a bar in Baltimore. He was hot - taller than me, lean build and willing to bottom. His size did not enter into my mindset at all. There was no pre-inspection or flashing - we met at the bar and the bartender introduced us to each other. We talked, came to an agreement and went back to my hotel. When he undressed I noticed he was smaller than average but it wasn't an issue for me. However when he saw me he apologized for being small and promised he would do a good job anyway. I was like WTF? I never doubted it, but he kept bringing it up and the subject really got me up! He just went into this total submissive role and expressed regret about being so small. I should add, he wasn't that small. Great sex, great night. It was a rush I ever expected.