Boost your mood - 9

Pucker up

Kissing is romantic, but it gives more than your sex life a lift. While male saliva contains testosterone, and a lingering lip lock turns out to be a reliable delivery system, smooching also floods the bloodstream with dopamine, which stimulates the same part of the brain as cocaine, for a natural high.

And if you need yet another reason to plant one on your beloved, smooch for heart health: Research shows that regular kissing reduces cholesterol in men and women alike. (Not in the mood for love? Here are 7 Ways To Bring Sexy Back.)