As a straight man, I can marry a woman of my choice. I cannot, however, marry a man of my choice.

If I were a gay man, I could marry a woman of my choice. I could not, however, marry a man of my choice.

Hmm... seems like equality to me.

Making a specific allowance for gays to marry other men is discrimination against straight men; we are only allowed to marry women, but gays are allowed to marry either.

The fact that I don't want to marry another man, or that a guy man doesn't want to marry a woman, is not the point. Marriage laws are the same if the couple loves each other or if they enter into the contract for material benefit. The government does not recognize 'love', so complaining that straight men can marry the women they love and gay men cannot is moot (or moo).