Similar to the "Abe Lincoln", the barbershop quartet involves an individual or a group of individuals ejaculating into the face of the "victim" before having a bag of pre trimmed pubic hair thrown onto the victim's defiled face. The men then procede to quickly don red and white striped hats and sing a brief song in four part harmony. In situations with only one man present, friends need to be called in and hidden before the act, ready to jump out to accompany their buddy.
Rob: Holy shit, she sure was surprised when you guys came out of the closet when I hit her with that bag of pubes.
Tony: Yeah, and Carl's soprano was fantastic!
John: That sure was one barbershop quartet for the books.