The cuckold - a man whose wife has sex with other men, or a man who has fantasies about his wife having sex with other men. Here is a story told to me that shows how a partner can mistaken the cuckolding sentiment for something else, and hurt their partner when they move from pleasure to humiliation against the man's will. There is a very fine line that, when crossed, can cause pain. Mister Average is a prolific erotica author and excels in themes like cuckoldry.