There is something that is just so damn sexy about grabbing a man's cock through his jeans. I know men who have told me they love it when a woman is bold enough to grab their cock. I find it hard to keep my hands off of it, personally. Cocks are magic...they grow and change and throb. I find a cock fascinating enough to want to play with it just to see what I can make it do.
And speaking of seeing what I can make it do...throwing ass play into the usual mix of things one can do with a cock can change things dramatically. I love to see how a man's cock reacts to the first few times he allows a woman to fuck him. They are all so different! And sometimes there is indeed that magic spot in a man's ass that can send him to the moon with pleasure, no matter whether his cock is hard or not.
Last night, what sent me over the edge into orgasmic bliss? I was thinking about Hot Guy, and how intensely erotic it was to alternate fucking him and warming his ass with a riding crop. Pretty fucking hot.