Break a sweat. Exercise, which increases blood flow, is a proven libido- and arousal-booster.
Turn up the heat. Dig into a dish made with chilesthey contain capsaicin, a substance that stimulates nerve endings, triggers the release of endorphins, and ramps up heart rate.
Revisit your honeymoon photos. Just the sight of you two in love and relaxed may summon the urge to get intimate. Page through the album together, and see what happens.