Most twins are double the pleasure, double the fun. But when it comes to Hugh Hefner's new girlfriends, Karissa and Kristina Shannon...
![](https://media.nbcwashington.com/2019/09/OTT-Washington-DC.png?fit=1920%2C1080&quality=85&strip=all&w=400&h=44&crop=1)
Most twins are double the pleasure, double the fun. But when it comes to Hugh Hefner's new girlfriends, Karissa and Kristina Shannon...