I sounds like five years of monogamy have dampened your desire and getting married sealed your fate.
One of the thoughts that helped me to cope with my fear of losing him was this: If I claimed to love him, why would I want to own him?
You are simply sexual!
The two deadliest elements against sexual happiness are Porn and Romance novels.
It's the woman who wants to break free of monogamy from time to time but her partner can't handle it.
The question is really about coming out as polyamorous.
After ten years of sexual monogamy, I'd say it's about time you had some sexual experiences with others.
There is nothing wrong or weird about your idea of two couples having sex in the same room as a way to later swap partners.
Don't forget who number ONE really is.....YOU!
We have retained both the ideal of ownership and the story that a vagina can be “polluted” by another human.