There I said it.
I see there seems to be some forum angst over using this sort of language (or the term share my wife) in a few posts lately.
This denotes ownership and I fully claim it. We are a married couple, we made promises to each other, and in those promises was the idea that our sexuality was now tied together. As long as it is tied together any sex she has outside of our relationship is truly allowed by me. I can revoke it at any time. If she chooses to ignore this and goes a head with it anyways she is in breach of those promises we made and it would be grounds for dissolving our relationship.
You can say we are joined, bonded, intertwined or any other more romantic but less pejorative term but it doesn't change it, I OWN her ass and I decide who gets to touch it as long as she wishes to be with me.
This does not mean I can force her to have relations with other people, but it does mean I have a say in who those other people are. If they make me uncomfortable in any way I can pull the plug and she will just have to live with it.
As should be obvious but I think I'll need to state this goes BOTH ways. She ALLOWS me. If she pulls the plug on a couple, thats it, I don't get to have sex with that other woman ever again. If they make her uncomfortable in any way, well I'll just have to live with it. If I choose to ignore that, she has grounds to permanently terminate our relationship.
We are NOT just people living together and raising kids together, who are free to go their own way without responsibility to each other. To be poetic we are now of one body, and WE must both decide how those bodies get used and if they get used. We must both agree or there is no more argument.