Sadomasochism Definition

sādō-măsə-kĭzəm, sădō-
The getting of pleasure, esp. sexual pleasure, from sadism or masochism, or both.
Webster's New World
Sadomasochism is defined as a sexual enjoyment of both sadism (a desire to give pain) and masochism (a desire to receive pain).
When a couple is in a relationship where the man enjoys whipping the woman and the woman enjoys being whipped and both derive sexual pleasure from these activities, this is an example of sadomasochism.

The practices of sadism and masochism collectively, usually in reference to consensual practices within the BDSM community.