Why do you think male homosexual have more mood and anxiety disorders?

[LostLocke]

One can hide the fact they are gay. One can't hide their race. // Advantage gay

And that there is where I'd think the mental issues come in.
Having to lie to everyone around you. (Keeping lies straight *pun slightly intended* consumes a lot of mental energy.)
Having to deny doing things you like, or going to places you want, or acting a certain way..... these things take a toll on your mental outlook and state.