Not married, but I would welcome the discussion about parameters and boundaries. As a single woman, I've had 3somes and 4somes, and have really enjoyed them. If I ever get married and hubby wants to try an FMF or MFM, I'd consider it, as long as certain things about trust and commitment were made clear up front. I know 3somes are fantasies for most guys - I wouldn't want to pour cold water on a dream or wish and risk him going outside the marriage for some thrills.....as long as I know he isn't going to get jealous or be upset when he sees me enjoying a fuck or sucking on another guy - jealousy happens and it is hard to get past it....