There's a Spanish language site out there suggesting that Ricky Martin came out of the closet because he's being chased by a gay sex tape and/or photos. They've even published some, which are censored.
However, it should be noted that, although the man in the photos bears a striking resemblance to Ricky Martin, the tattoos in the photos bear no resemblance to Martin's.
I would like to point out a post I published back in December 2007 featuring Ricky Martin's XXX film doppleganger (below), who could very well be the man in the photos.