Musty Musket

The act of a male partner receiving a blow job from a female and then using her spit as lubricant for anal sex, until she shits and then the male partner using a small metal tamping rod to shovel the shit into his spermatic vein. And then proceeding to pleasure himself until he ejaculates, and the sperm shoots the shit out like a musket.
(This act may also be utilized In gay encounters or self pleasure such as gooning sessions)