To have a sharing relationship with a young well hung black guy with a thick 10”, who is a friend with both me and my wife. The guy and would be one of our best friends and my wife would be sexually available to him at any time he wants with total approval of all concerned. Everything totally above board in the open with no jealousy or put downs both guys being equal in the relationship. I would not be necessarily be around when they had sex and she would be available to go on dates and holiday with him.