None AFTER the first real girlfriend I've had. She not only cheated, she ABUSED me. I was so trusting, so naive and she played me like a fiddle in a Saint Patricks day parade. (lol) Really ruined me for every other girl I'd ever be with after that. I'm actually glad that it turned out like that because it made me the person I am today. "No prisoners", "No mercy" whatever you want to call it. "No Bullshit" maybe? Whatever. I don't tolerate anything. Nothing. Unacceptable.
After her, I was always the one to break off anything I had with a girl. Always. Never stuck with anyone excpet when my wife came along. She "saved" me without either of us knowing.