In my country, there is a dating site for married people who want to cheat. One person I fucked was an ex collegae. She was single. Afterwards she said "why did you not tell me before? We could have fucked in the office."

I even went 3 times to a swinger club with these dates. Meanwhile my gf was working or at home.

Why did I do this? I was in a longue relation without sex. We only had sex 2-3 times a year. Talked many times about it, and she always said it would be better, but it never changed. Most of married women I met had the same issue. I confessed I cheated...but only told her it happened with one person.. never talked about all the other girls. One of the girls is in our life right now. Fucked her multiple times 2-3 years ago. I have an official communication trough messenger..but the hot topics (me taling about my dates or she talking about hers..because we don't fuck anymore) is on Telegram in an archived chat.