How to do it:
This position is all about control - so take it from the get-go and have your man lie faceup on the bed. Turn around and straddle him - so your back is toward him - and then lower yourself onto his erect penis. Extend your legs back toward his shoulders, relaxing your torso onto the bed between his feet. With both your legs and your man's forming an X-shape, start to slide up and down. Use his feet for added thrusting leverage.
Why it's hot:
Who said guys are the only ones who love X-Rated things? This position gives you total control, so experiment with different types of stimulation to see what pleases you both most. Your man will love relinquishing power and watching you take charge of your own orgasm. It doesn't hurt to add some X-Rated noises, letting him know just how good he feels.