Sex experts spill their hottest tips.

Cosmo found 15 stars in the friskiest field-and got each to reveal the best in-the-sack advice they have.

* What would you give for a private consultation with the people who dole out down-and-dirty advice for a living? We asked the passion pros to spill the sexiest, most unexpected tip they have in their titillating bag of tricks--the one they swear by in their own bedrooms. Read on for their headboard-banging, nightstand-knocking, duvet-pounding pointers. But brace yourself: These dirty little secrets will send shock waves from your toes to the tip of your tongue.

"A little-known secret to astounding sex? Staying focused in the moment. As passion heats up, we tend to concentrate on the quest for orgasm rather than what's happening right now. For an intensely prima1 connection, open your eyes and study his sizzling gaze. Be aware of the feel of his kiss--tune in to the temperature and the taste of his mouth and how your lips fit with his. As you run your fingertips over his chest, thighs, and abs, notice the contours of each muscle and inhale the smell of his skin."

Lana L. Holstein, M.D.

give the missionary a makeover

"To pump some red-hot passion into this ho-hum position, add a new kind of friction. On your back, keep your legs straight and closed against each other rather than the usual spread-eagle pose. When he enters you, squeeze his penis between your thighs, causing him to brush against your clitoris with every thrust. The bonus for him? When your legs are closed, your vagina becomes tighter, so he'll feel the friction too. A win-win situation!"

Ava Cadell, Ph.D.