the joy of sex
An informative book published in 1973. It was intended to help couples spice things up in the bedroom It featured illustrations of hairy, gross, 70's-style people going at it like monkeys. Some featured moves: the buttered bun, clothed intercourse, Chinese style, the big top, the tongue bath, anal intercourse, etc.
God forbid you mix up THE JOY OF SEX and THE JOY OF COOKING: "Who wants hair pie?!"
Joy of Sex beard
A beard similar to that of the illustrated male character in the book "The Joy of Sex." Specifically it is a full coverage beard with slight shag along the bottom of the jaw and dark in color.
Dude, you should shave. You're lookin' pretty shady with that Joy of Sex beard.