In the spirit of the "pic collectors" thread... here's a similar thing that seems prevalent to this site in particular...
"Candaulism...is a or in which one person (usually a man) exposes his (usually female) partner, or images of her, to other people for their voyeuristic Candaulism is also associated with and .
The term may also be applied to the practice of undressing or otherwise exposing a female partner to others, or urging or forcing her to engage in sexual relations with a third person, such as during a activity. Similarly, the term may also be applied to the posting of personal images of a female partner on the internet or urging or forcing her to wear clothing which reveals her physical attractiveness to others, such as by wearing very brief clothing, such as a , or or a low-cut top.