I am with Stacy on this one, and I HAVE been engaged, cheated on, been the cheater, and lived with someone. Living with someone now, and thankfully, I have not even had thoughts of cheated and I trust him 100%. Of course, our goals are the same, we still have lots of fun, and we are rather open, but still short of an open relationship. We both will be monogomous (threesomes don't count...hehe) and are open with eachother if we have thoughts otherwise... Thats the key, openess. If it wasn't there, I would be gone, or he would be gone, we would move on.