Vanilla Wife

First post but we’ve lurked for a week. Why does my husband want to see me have sex with another man.
I give him good sex and he enjoys it. Is this a man thing.
I think it depends. My ex gf was the instigator. She made it all happen. From bedroom fantasy to reality. I would say men and women both get different things out of it. I enjoyed the feelings of sub, jealousy and arousal.