what does cuckold mean in porn?

A cuckold refers to a man who is married to an unfaithful wife, one that's committed adultery.

In the porn industry the term is often used regarding a fetish, a sexual fixation or fascination, whereby a man receives sexual gratification by knowing his wife is cheating on him, perhaps by watching from a hidden location, or having his wife record video of the event; it may also describe a man who derives pleasure from being dominated by his wife or partner.

The origin of the word appears to come from an allusion to the cuckoo bird; the female of certain varieties of the bird would lay its eggs in other bird's nests when they were unattended for the resident birds to care for and raise.

After the scandal broke about U.S. Army General David Patraeus having an affair with his biographer Paula Broadwell, it was revealed that her husband, who was referred to as the cuckold in some press reports, may have been seeking ethics advice from a column in the New York Times.