Mr. Big

Spend 10 to 15 minutes in foreplay to help the vagina expand, and use lube. Choose her-on-top moves to control how deep you go. Have her lean over your body with her hands on either side of your head on the floor or a mattress, "as if you're about to do a pushup," says Morse. "It also helps for you to bend your knees so you can lean back for support."