Over the years, it's become astoundingly obvious that Hugh Hefner can have as many girls at once as he wants to.
Seriously, how many foursomes do you think the guy had with Holly Madison, Kendra Wilkinson and Bridget Marquardt... per night?
Now, of course, Hef's latest conquests are a pair of 19-year old twins named Karissa and Kristina Shannon. And we have no doubt he could - and does! - invite both into his room each and every evening for a few rounds of old man sex.
But what if he couldn't? What if Hefner were limited to just one sister? Which should he choose?
Which of the Shannon twins is hotter?