I can vouch for that. I have asked gays how that can not be considered discrimination and they never get it. Special class and all.
I've also heard, trying to put it delicately...that due to the nature of sodomy, and its lack of discreet limits...hotel rooms can, and often do, get seriously trashed (and become an actual biological hazard-- try not to think about it too much...ewwwwww....) after rental by homosexual men.
There are a multitude of public health reasons, besides the moral ones, why historically those who've chosen a perverted promiscuous sex life have been ostracized by civilized societies in the past. In the western world we're sowing our own doom in abandoning common sense by protecting and promoting sodomy.