This is an interesting conversation. My W had a rough childhood with her family basically disowning her. My parents got D when I was 10 and remarried a few years later. I thought marriage would be easy also. I got comfortable and lazy which I think is the biggest reason I'm even here.
The thing that I always thought was odd was that W said recently she was always thinking about D for the whole 13 years we were married. I just couldn't fathom living with that kind of fear. She had this phobia that people would leave her. So instead of speaking up and fighting for what she wanted, she says she didn't fight at all in order to save the marriage.
Might just be WAS talk, but who knows? I think it has helped me appreciate how different her thinking is from mine. Some days, I feel like I really need to relearn my W.