Russian & same-sex marriage

[tisoi.livejournal.com]

Today in class we learned the terms for being married мужем/женат and single замужем/холост and how the word used depends upon whether or not the person is male or female. I also noticed that the male word for married contains жена (wife). And that the female word for married & single contain муж (husband).

Now, I know that same-sex marriages are far from being legalized in Russia, but it is in other countries. Could one say он мужем to refer to a man who has a husband and она женат for a woman with a wife?

And since I'm gay myself, do I say я замужем to say that I'm single? And what does холост mean exactly?

Спасибо!