no but homosexual said that marriage will stop promiscous homosexual sex LIKE MAGIC! POOOOOOF! tada instant monagamy!
Longterm, maybe it doesn't work like this in your town, but I know a lot of people who go through a promiscuous period, then settle down to one partner. Sure, sometimes they change a partner, after another promiscuous period, but they settle back down to one partner again. Homosexual people and straight people both do this.
At some point, maybe the first time, if you're darn lucky, you find the right person to make a very long term go of it, even till death do you part. It really does happen to gay people, too.