If my husband had a one night stand or otherwise briefly cheated on me, I would be okay with it, as long as he knew what he was doing to our relationship, and being honest to himself and me about what he was doing and his thoughts/feelings, without hiding anything. Being open is important. Him not loving me anymore or feeling strain in the relationship is a huge issue that I would like to know about to see if it's something we can work on. Then if he really wants to bang someone else aside from that, he can go ahead. But if I were in a loving relationship, I would not want to bang others, because I wouldn't imagine I'd get pleasure or gain anything from banging someone I wasn't committed to and in love with, but that's just how I operate.
That said, I've never been married or cheated on, so I wouldn't know how I'd really react.
I have technically cheated before, on a guy I dated for 2 months, with a guy I had been with for 2 years and was/(am?) still in love with, but who didn't love me at the time. I never fathomed I could have done something like that in my lifetime.
I asked that first guy out a couple months before I had a trip to visit my ex in Korea planned out. It was a bad idea... I really didn't like him that much. I was very depressed and anxious and had very low self esteem, and I guess I subconsciously wanted to "test" if I could still function in a relationship, or missed the emotional support or something. I told the victimized dude all the details about the status of my previous relationship and my emotional state, and plans to visit my ex so that he would be aware of all the "dangers". I broke up with him after a month because I wasn't feeling anything and I told him so, but he asked me out again, and the second time around I thought it was more meaningful. When I went to Korea, halfway through I had no contact with the guy I was dating, and I was spending all day every day with my ex. I fell in love with him again and realized I wanted to stay committed to him still. We both knew the current situation with the guy I was dating. I knew I had to break up with him as soon as I got back. On the last night before I went back to Canada, I went to stay the night at my ex's house for convenience purposes. I don't know if he planned it... I assumed we'd sleep in seperate rooms. But then he decided we should watch movies instead and something happened like
Anyways, that was that, and I told the guy I dated back in Canada what happened and we broke up. He took it really well, and we still talk and hang out often. Man.. the other week we were hanging out with people and he offered me chocolate. It was like "I cheated on you, and now you're giving me chocolate?! *disbelief* " I didn't say that lol. I do feel sorry for how he must have felt, but I don't feel any remorse for what I did. Dating someone in that situation was stupid in the first place, and it's something I'm not going to do again. As for my Korean ex, the situation is now... idk.
Whether I would date another person who cheated before, really depends. Every situation is different.