I never have btw, but I was talking to my good female (and male) friend about this and my female friend didn't have a problem when she was doing the cheating and my male friend didn't really have much of an opinion.
Then we got into what constitutes cheating and my take on it is, pretty anything that you hide from your partner or delete from your phone.
I think cheating is very black and white, there are simply no grey areas. If you're not happy (or miserable enough to seek comfort or sexual 'excitement' from others) it's wrong. Maybe I am wrong? Perhaps I'm too 'old skool' and I'm expecting the impossible?
Thoughts?