Illustration: Mark Matcho

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Snooze Better
Levels of the hormone oxytocin surge after sex, and its stress-reducing qualities may help you nod off more quickly. (The relationship between shut-eye and intimacy works the other way, too: One study found that women ages 42 to 52 who reported restless sleep patterns were less likely to get physical pleasure from sex than women who regularly got a good night's rest.)