Sex. Obviously. I encourage you to tease you friends using this phrase... especially around their family. See also Sex.
Exceptionally ugly, as in his or her physiognomy is prima facie evidence, so to speak, that X "regularly mate(s) with" Y, etc. See also Sex.
A tin-lined, wooden box designed by former Freud pupil Wilhelm Reich to capture the healing power of the orgasm and cure such ailments as cancer, depression, and impotence. See also 50's, Sex.