i have before. for no reason other than to bust a good nut. i look back on it with fondness too, fuck it. some of them have been for the experience. i don't know about y'all, but how often do you get sucked up by two chicks at once? that shit has happened to me one time, aint no way i was going to let "being faithful" get in the way of that. some may consider it weakness, and i might agree. it is.
i've been lucky to cheat on women i had no intention of being with long-term anyways. so if i fucked the situation off because of cheating, i had no regrets. still don't.
would i do it now? no. but ask me that question when i was 18 to 24 years old and i might have answered differently.
i was in a long-term relationship for six years. there were times when women were throwing puss at me, and i would not oblige because of my relationship. so i've found i can do both, depending on the situation i'm in at the time.