For those concerned about Hugh Hefner's love life, fear not - he can tell the difference between his two twin girlfriends (read: whores). This is important because when they get naked and commit all sorts of naughty incest together, he'll know which one he fell asleep on top of. It's hard for the 83-year-old guy to stay up past 6 p.m.

How can Hugh Hefner tell 19-year-old twin girlfriends Karissa and Kristina Shannon apart? At Monday's Sports Dream Celebrity Poker and Pool Party in L.A., he pointed to a mole on Karissa's neck.

"That's it!" he told Usmagazine.com at the event. His third girlfriend Crystal Harris also "can tell the difference between [Karissa and Kristina] and they can tell the difference because they know the other one is not her!"

At the event, Hugh confirmed the four of them would be part of next season's The Girls Next Door. Or as I like to call it, "The Longest Viagra Commercial Ever."

"Oh, yes! You are looking at part of the cast here," Hugh said, pointing to his girlfriends. "We are going to have a lot of fun."

"... or really, they're going to have a lot of fun," he continued. "I'm going to sit in my lounger and watch Law and Order and eat prunes. I love prunes. And Life Magazine. Huh? What? Where am I? Who stole my wallet. Get out of my house you hippies!"