Up for a Little Competition?

Boosting a woman's dopamine levels outside of the bedroom could pay dividends between the sheets. "Your brain can't differentiate between the external anxiety caused by a novel situation and the internal anxiety caused by being attracted to someone," says Victoria Zdrok, Ph.D., a clinical psychologist (and former Playboy playmate). "A boost outside of the bedroom can carry over for when it matters most."

The best way to increase her anxiety, sans cardiac arrest? Competition, says Zdrok, which also helps release sex drive-boosting testosterone. Men's Health recommends signing up for a couples adventure race or just bellying up at the local pub's trivia night; by competing on the same team, you'll also improve communication and cooperation, the two behavioral foundations of sexual success.

Better than a slice of pizza

While there's a widely held belief that a half hour of energetic sex burns the equivalent calories in a slice of pizza, it's just not true.

Let's look at the math: A half hour of vigorous sex burns about 85 calories, and a slice of plain cheese pizza is about 230 calories, while a slice of pepperoni is about 290 calories. So, it's pretty clear that it takes more than 30 minutes of active lovemaking to burn off a single slice.

Do Unto Others...

According to a recent Glamour poll, 89% of guys polled say they'd rather give their woman a mind-blowing orgasm than have their own.