On occasions I view some vanilla family and parenting boards, which are populated primarily by women. Sometimes there will be a thread about nonmonogamy, like "my husband wants to swap with another couple," or "I want a threesome," etc. (The replies fall into three general categories: "We do that - try it," "We don't do that but have fun," and "Just thinking about that is despicable.") All understandable except the few who reply, "I used to ........... (have threesomes, swap, do anal, give blowjobs), but now I'm married and he better not even bring up the topic or I'll kill him." Some women say their husbands don't even know about their wild past sex life. To me, how can you not discuss an important part of your past (and present and future) with someone who is supposed to be closest to you? How can you deny your mate at least a discussion of giving him his fantasies?
Another topic was about not going to bed mad. Sounds like a good idea if you can pull it off, but in our poly family the dynamic is different. If one of us is mad at someone in the family (we're all lovers except the guys), that person will go to bed with someone else. Two advantages: the other person will talk some sense into you, and you can still have sex without thinking you're giving in.