I think it's a matter of taste. I'll have my sub "dominate" me for a little while during play sometimes; on rare occasions he'll actually ask to do it; it's usually short-lived because the minute we get too turned on, there he is on the bottom almost by accident, but it's still a fun game we like to play.

We both trust each other implicitly and we both know who is in charge, so I suppose for us, it is just a fun game.