I agree with Yamada, I like being on my back for it as well. I start to shake when I get close and as well, like most women I know, I'm not very comfortable with it... can't hold anything in that way lol.

I like the idea of being on your hands and knees while he goes down on you from behind. I always wanted to try it, but was never able to for multiple reasons.

Also, I was thinking, that if you knelt on the bed while he knelt on the floor, once he'd licked you for a while and you were good and wet, he could stand up and simply enter you from behind =) I think I like that idea best ^-^