I've been thinking about this and I think your personal fetish often depends highly on what you feel vulnerable by or personal insecurities. Of course It can swing in both directions take a "alpha male" imposing a dominant position over a girl in which they might find comfort and you use...
I bring you home from the bar. I'm pretty cute. We're both kind of drunk so we start making out. I rub your growing bulge through it's jeans. I can tell you want me to suck it but don't know how to say it. So I start kissing your bulge as I am zip and unbuckle your pants. With a moan you're now...