What's this Thing with Guys and Pee?

We'd just gotten over the R Kelly pee deal when Tiger Woods start sexting about wanting to pee on people and now here comes Diddy with his pee talk.
They say Diddy got on the mic at party in New York the other night urging everybody to buy Ciro Vodka by yelling to the crowd,

"If you're not drinking Ciroc vodka, then you're drinking pee pee!"

That Diddy. So damn classy.