Happy Valentine's Day! Here's a dozen of the craziest romance-related studies we've ever featured.

What's better than a dozen long-stemmed roses on St. Valentine's day? Why, a dozen romance- and sex-related scientific studies, of course! Enjoy! 1.) A squamous cell carcinoma with a Saint Valentine's Day message. When your cancer loves you. 2.) When love makes you blind…literally. "Our patient experienced transient monocular visual loss every time he reached the climax of sexual intercourse, but never while performing strenuous physical exercise." 3.) Will your love last? This mathematical model may hold the answer... " Scholars and therapists agree on the existence of a sort of second law of thermodynamics for sentimental relationships." 4.) The odors of the human vagina. It's pretty much what you would imagine. 5.) Sex burns 3.6 calories a minute. "Objective: To determine energy expenditure in kilocalories (kcal) during sexual activity in young healthy couples in their natural environment and compare it to a session of endurance exercise." 6.) Can differing ...