Candaulism

The term may also be applied to the practice of undressing or otherwise exposing a female partner to others, as well as to either the consensual posting of personal images of a female partner on the internet or to urging her to wear clothing which reveals her physical attractiveness to others — such as a microskirt, tight-fitting or see-through clothing, low-cut top, or minimal-coverage swimwear.

[2] King Candaules of ancient Lydia, according to the story, conceived a plot to show his unaware naked wife to his servant Gyges.

[3][4][5] Isidor Sadger hypothesized that the candaulist completely identifies with his partner's body, and deep in his mind is showing himself.

[9] Robert Hanssen was an American FBI agent arrested in 2001 for spying for the Soviet Union and the Russian Federation.

Later still, Hanssen appropriated video equipment from the FBI to set up closed-circuit television to allow his friend to watch from his guest bedroom.