I think that this thread, in its current state, may make my gram's heart stop... but, my gram is very old and very Suzie Homemaker in a very traditional way.
I will say that this thread has been... eye-opening for me. My naive South Dakota brain was unaware that anyone that wasn't a pervert or a religious zealot would engage in a non-monogamous relationship. Bit of a paradigm shift to know that people - people that I would consider *normal* - engage in this sort of thing. Still don't think that I could approve of it - let alone engage in it myself, but it has certainly enlightened me.