I have never cheated. Part of it, for me, is that I want truly intimate relationships and that is predicated on honesty. It’s not that I tell my partner everything, but what I do tell him is the truth. What’s the point of being close to someone if you can’t be real with that person?
OTOH, I have been quite up front about breaking off relationships when they are no longer working.
I once told a friend of mine who was cheating on her husband — you are allowed to change but you should be honest. Tell him you want out, bring closure to that relationship, then start up the new one.
Of course she didn’t, and the house of cards eventually fell. But, surprisingly, they are still married. I don’t really get it because they don’t seem happy together but it’s their business.
My current bf and I are painfully honest, as he’s German and I’m me. But it’s good. I asked him once if he’d ever cheat on me and he said he wouldn’t because he knows I wouldn’t tolerate it. He won’t risk losing me.
Because we trust each other, though, we have a lot of freedom in the relationship. I went to Europe a few months back with a guy friend. My bf was totally chill about it. He has a couple of close women friends who are incredibly hot. I am chill with that. We don’t own each other, we choose to be together and we trust each other.