I am pretty sure this is his boyfriend/partner Thomas Dozol (see next picture for comparison)
(Dozol comparison shot from TheSelby photoshoot)
The nipples and the eyes look the same to me
Don't know who mop top is? Rentboy, maybe?
And I'm assuming it's the Rentboy's ass, and Stipe sitting on the toilet in the background?
Individual potentially NSFW source pages: Stipe, Rentboy, Dozol, Ass-shot
Would you publicize that you had a 3-way if you were famous? What about admitting that you cruise a sleazy website like GuysWithiPhones? Oh, and that awful waste of space Jonathan Jaxson posted a few clothed pictures of himself (here is one) -- nothing quite as bad as that horrible masturbation video he did to try and seduce He Who Shall Not Be Named