it is the perineum, the endearing patch of flesh between the man's scrotum and anus (women have one too, between vagina and anus, though 'choad,' a playful pejorative, has become more associated with men); 'taint' is the more female word of the said area, though choad and taint are technically gender neutral; it is still undecided as to whether taint/choad is an erogenous zone, given the eerie-'kinda nice'-but-weird feeling of having one's taint/choad coaxed by an earnest amateur's tongue