I have a friend who literally only sleeps with married "straight" men. I tell him all the time that I find this to be absolutely despicable and I don't want to hear about it. His defense is:
1. The wife doesn't put out anymore.
My response: So what? That doesn't mean they aren't married anymore. He made a vow to another human being. And if he isn't happy, he needs to leave.
2. Nobody's getting hurt.
My response: Would you have that same attitude if someone did that to you behind your back?
3. He's gonna leave his wife.
My response: Yeah. Fucking. Right.
I find it absolutely reprehensible that there is an entire subculture of the gay community dedicated to bedding married men. It's just sick on both ends. For one, the man is MARRIED. Not just talking to someone. Not just testing the waters. MARRIED. In lots of cases, the men have children. If you're a married man sleeping around, you should be ashamed of yourself. As should you be if you're a man (or woman, for that matter) who chooses to be intimate with a married man.