Pussy whipping refers to the phenomenon that happens to straight males and some lesbian women when they regularly get good sex from a woman, most likely their girlfriends, domestic partners, or wives. These men and women get a good pussy whipping, wherein they choose to forget their free will and agenda. They end up following the whims and wishes of their lady partners.
Alternatively, pussy whipping is a form of BDSM play where the dominant party uses their hand or an implement to strike the genital region of the vulva. It is important to remember that genitals can be very sensitive. Respect the submissive's boundaries.