the act of masturbating and defecating simultaneously, describe by some who have tried it as a tug of war between your anus and penis.
the key is to ejaculate at the same as you are defecating to achieve a totally new level of sexual pleasure
Guy 1: Hey you ever tried a hewell?
Guy 2: Nah man, whats it like?
Guy 1: its hard , but its pretty much sexual nirvana