Facesitting

I only got this as part of the service when I did femdom. I've seen two styles of face sitting in SM. Normal face sitting, the pussy literally tries to smother you. The one I experienced, it was the thighs. The mistress' pussy is so near yet you can't put your tongue in it. Control and teasing, and if your into masochism the feeling of being out-of-breathe (there is a "rush" when you can breathe again).

I'm sort of an in-between. Generally I didn't hate it but I think if your goal is just to eat pussy (and not breathe control play) there are other better positions.