Too Many One-Night Stands? Blame Your Genes (Time.com)

Time.com - Of all the shopworn, will-not-fly, don't-even-think-of-trotting-it-out excuses for cheating on your significant other, the "I couldn't help it" ploy has got to be the worst.

Mischa Barton Molly Sims Monica Bellucci Myleene Klass Naomi Watts