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.