Can't live without sex

Lock on the bedroom door? Check. Lustful twinkle in your eye? Check. Read on for the bedroom wisdom you can't live without.

16. But sometimes "Just do it" really does work.
If you wait to be struck with a spontaneous urge to tear his clothes off, you may be waiting a very long time. But if you simply decide to give it a go, your body (and your desire) will often catch up.

17. Kegels are key.
These exercises strengthen your pubococcygeal (PC) muscles, a.k.a. your pelvic floor muscles, giving you more control during sex and intensifying orgasm, says Minkin. To do them, squeeze as if you're holding back urine, then release. (For a more detailed how-to, go to redbookmag.com/kegels.)

18. Your birth control method is not till death do us part.
You need to reevaluate your pregnancy-prevention method at least twice in your adult life, says Minkin: when you go from wild woman to a mutually monogamous relationship, and after you have children. Not only does your body change post-baby, but your habits may change, too (making you a less reliable Pill taker, for example).

19. Doggie-style can be fun — really!
It can make you feel a bit raunchy — and that's a good thing. It just suffers from bad PR. Let's change the name — like how the marketing people changed prunes to "dried plums." Hands-free sex? Getting the backstory? Taking the bull by the horns? Heck, call it Loretta, but try it.

20. Pain during intercourse is not normal.
Occasional discomfort may just mean that you're tense or haven't had enough foreplay, but if sex hurts often, see your doctor. "It could be as simple as a low-grade urinary tract infection," says Minkin. Whatever it is, you don't have to suffer.

21. The way your vagina looks, however, is perfectly normal.
And no, we don't have to see it to know that.