Karissa and Kristina Shannon are moving on to bigger and better things. In other words:

They'd like to have sex with someone that possesses fewer wrinkles than Rex Ryan's game plans for the New York Jets' defense.

Indeed, earlier today, Hugh Hefner confirmed that the twins are moving out of the Playboy Mansion and relocating all the way across the yard. The magazine magnate Tweeted:

"The Shannon Twins are growing up. They're moving to the Playmate House with my blessing so they will be free to do other things."

Hef said the busty blondes want to travel the world and partake in endeavors that other Playmates have recently enjoyed. Does that mean we should expect them to squeeze out a baby and pose for every tabloid imaginable over the next year?

Fortunately, things between the Playboy founder and 23-year Crystal Harris couldn't be better, Hefner added. But that doesn't mean we should start listening for wedding bells. He told E! News:

"I haven't had a lot of luck with marriage. I don't have a good track record and I don't want to screw this one up."