Have him twice tonight: if sex goes by so fast that you don't get a chance to moan, claim your right to a sizzling second round. Trust us, he'll be up for it in more ways than one. (Lust Lessons).

Would you rather ride your favorite roller coaster once or get an all-night pass? Since you're likely an up-for-anything chick, we know you'd pick option two. So why settle for just one go-around when it comes to your sex life--especially when doubling lap on the deed could increase your orgasmic potential? "When your body is still turned on from a previous round, it's easier to climax," explains Joan Elizabeth Lloyd, author of If It Feels Good.

Plus, since your man won't come as quickly the second time, he'll have more erotic energy to spend pleasing you (and he'll feel like one helluva stud for going the distance). But you can't just expect sex after sex, and ...