Looking for love online? Dating website, okcupid.com crunched a lot of data to determine what are the most appealing photos its users feature on their profiles? Like going shirtless, guys? It works, says CEO Sam Yagan, because its shows women there is stuff there to flaunt. Yagan gave CNN's Don Lemon okcupid's other tips to improve online looks and get your dating profile pics noticed for Valentine's Day and beyond.