MFM

I never got round to posting something about my OH having an fling years ago, admitting it, and then telling me to do the same. Well he did and I did. Only problem has been that his fling was a mate, who now never really talks to him, mine was a guy I got chatting to online and turned out he lived nearby, we've continued chatting. I think that my said fling has now got married tho, he's not bothered mentioning this, but is still chatting to me.... wonder if his new wife knows? Thankfully my OH knows that I still talk to fling.

If two people in a relationship are open, honest, agree and want the same thing, is it wrong for them have flings with others, or bring a 3rd person into the bedroom?
Do most relationships fail, when a person cheats, lies and covers things up?
Do men or even women,think "It's ok for me to do it, but I don't want my partner to"?
Also, how come it always seems more acceptable to talk about FMF fun, than MFM fun? Men seem to have the monopoly on bragging about themselves and two women, yet poor young girl is just a slut for even thinking about having two guys!

Going back to fling, who is a soldier, turns out he's now in Afghanistan. Hope he stays safe.