Quote by sweetjenny
The whole concept intrigues me greatly. Does the man get off on seeing his wife with another man, or the humiliation of the act. I’ve had boyfriends who have asked about previous partners, who was the best, the biggest, who made me cum. And it surprised me how turned they got when I answered, wanting to know the details. Is it insecurity or a desire to be dominated ?
There are many flavors to it, so the answer will vary for different persons. For me, both the desire to be dominated and insecurity are there. I like the humiliation aspect to which many are distanced. I experience strong emotions like jealousy, by admitting my partner enjoyed (or is enjoying, or will enjoy) someone else, preferably a sexually superior person. Superiority will both help me feel more jealous and give more pleasure to my partner. I empathize with my partner's pleasure, so higher her pleasure, higher mine.
It is quite complicated, so it is hard to define it thoroughly. However, I can try to answer more specific questions, if you have.
There is of course the famous theory of "sperm competition". You may find some info in the internet about it.