#2 is the dumbest ing argument I've ever heard.
If you use the logic that it's an extra right for a gay man to be able to marry another man, since he already has the right to marry a woman, then you can also say that a straight man would then have the right to marry another man if he so wished. So both straight and gay people can marry men or women. So there is no extra right.
Furthermore, why would a gay man marry a woman? That's not a right, that's a waste of time.
By the way, I'm drunk. Hahahahaha....
Whatever, give the gays whatever the straights have.