Do I have a moral responsibility to not sleep with guys who are taken?

Recently I met this lovely guy... Who is happily married. First thing we really talked about was his wife, how they met etc. He seems really happy with her.

And then... one thing led to another and we have been getting into bed quite a few times.

Am I, a single woman, doing something wrong here? Do I have a moral responsibility to not sleep with a man just because he is married to someone else?

From my point of view - he is just as much of a cheater if he wants to cheat, regardless of he succeeds or not. So I don't think he wouldn't be a cheater only because I would say no to him.

And also, it's really good sex and he treats me like a princess.

Unless he's told his wife and they're in an open relationship, you're his dirty little secret.
If you don't give a crap about potentially destroying this other woman's life, go ahead.

Also, the justification that "oh well if I don't have sex with him, someone else will just come along and do it." is demented.

I just don't see why he isn't guilty if he would try really hard to get me into bed but fail to do so. How is that not betrayal? Why is it so important to their relationship what I do? His desires are the same, his choices are the same.

First time I met him I rejected him because he was married - I figured he would regret it later. Next time I saw him he was behaving the same way, obviously still determined to get me into bed and obviously wasn't acting on impulse of the moment, he had thought it true.

And I am not destroying this woman's life. First of all, I am not the only one he has been with and it's not like this started because we fell in love or anything like that. She won't be able to find out about me either. He just wants to sleep around and we enjoy each others company. They probably do have a happy marriage - he is a sweetheart to me, so he probably is to her as well! I bet he treats her like a princess. Now what's so wrong with that?

I just don't see why he isn't guilty if he would try really hard to get me into bed but fail to do so. How is that not betrayal? Why is it so important to their relationship what I do? His desires are the same, his choices are the same.

And I am not destroying this woman's life. First of all, I am not the only one he has been with and it's not like this started because we fell in love or anything like that. She won't be able to find out about me either. He just wants to sleep around and we enjoy each others company. They probably do have a happy marriage - he is a sweetheart to me, so he probably is to her as well! I bet he treats her like a princess. Now what's so wrong with that?

Do unto others as you will have done to you. You won't be so glib about ruining other people's lives when you find out your boyfriend/ husband has been betraying and making a monumental fool of you behind your back. It has happened to me, and there is no more debilitating, humiliating, heartbreaking and life changing experience.. She didn't care less that she caused my whole world to fall apart, all for the sake of getting her sordid little ego stroked.

Absolutely shocking behaviour, and attitude. Women like you are lacking some basic empathy/ morality traits that seem to come naturally to others. Some could say you're emotionally retarded.

I would say that it is immoral. You're helping someone lie and cheat. Obviously it's more his fault, but you still have to take some of the blame. You're hurting his wife. Eventually you'll be hurting him (if she finds out and wants to divorce him or whatever). And you're also hurting yourself. If you get emotionally invested in this relationship, you're probably setting yourself up for failure. Looking at statistics, he most likely won't leave his wife for you. So you're getting yourself invested in a relationship that has no future and eventually he will kick you to the curb (either when he gets sick of you, starts feeling guilty, or if his wife finds out and threatens him with divorce).

If you're just in it for the sex and don't care if you lose him, whatever. It's immoral but I obviously can't stop you. But if you do get invested, you're just setting up everyone to get hurt.

There are times when people have to learn to do the right thing on their own. Nobody here cares cause neither do you. Being treated like a princess in your opinion is just getting shoved left, right, up and down all over the room lol by a guy who doesn't give a damn about you. Do women think so little of themselves these days. Then again if you don't want commitment I guess its the ideal 'relationship'. But honestly, if this is the best you can do then you're definitely not an eye-catcher.