Why do I fantasize about my wife with other men?

It's normal to be excited by a fantasy that you don't want to fulfill in real life. By fantasizing about your wife with other men, you are aroused by the the thought of her desirability to other men. The fantasy allows you to play the role of voyeur, to see your wife acting sexually abandoned and uninhibited outside of the context of your relationship. It's also exciting to fantasize her desiring sex purely for her own physical gratification and initiating activities with partners in scenariOS that would most likely not occur in real life.