I'd say 80% are in totally happy relationships and they cheat because they enjoy cheating but they also tend to enjoy the other partner too.
That's not been my experience, personally. I do think a lot of them have a sort of honeymoon period where they enjoy getting the 'best of both worlds' but that's not the same as being happy and satisfied in life.
I think the thing that's struck home most is the statement that people who have affairs aren't happy.
This is pretty much the only constant I've seen among people who I knew to be having affairs. And some of them do seem to have golden lives on the surface, or even be rather smug and blasé and unbearable. But they're not happy. Plenty of people with apparently blessed lives are in fact depressed.
I don't think this excuses them making others unhappy, but I completely understand that being very unhappy makes you do things that you would not do otherwise.
I certainly agree that being unhappy doesn't give you the right to hurt other people. Some people who I've known to have affairs don't seem to be capable of being happy, of being satisfied with anything. I'm certainly not saying that all cheaters are tragic heroes. Some are awful people and I wouldn't expect anything better from them. But yes, they do all seem to be unhappy. Pretty much all OW I've known have been very very unhappy. A couple did a very good job of pretending they weren't, but they were.
If leaving is so easy, why is the Relationships board brimming with women who can't seem to leave the most disrespectful, toxic and abusive of men?
The friend I referred to earlier was the person who first challenged my own very black and white 'cheaters are always scumbags and bad people' perception. She is anything but a scumbag and a bad person. But she was utterly financially dependent on her husband, to a great extent she was emotionally dependent on him (or at least the idea of him) and he just...didn't give a shit.
Oh, he tore her a new one when he found out about the affair, she had broken her vows, she was a bitch, etc etc. And what about his own vows? I witnessed him promising to have and to hold, to love and to cherish, and then fucking off every chance he got, thinking he'd paid her so she should put up and shut up.
I started to realise that I couldn't actually understand what he was so angry about. He hadn't shown her any affection in months, possibly years, and he had no interest in working with her on it. He might as well be upset because his cook or chambermaid had slept with someone, for all the emotional betrayal there was going on there. As I said before, plenty of people stay faithful not because they love their partners but because the rules say 'don't cheat'. Means nothing, really.