a)residue found on the penis of a homosexual male after anal intercourse...
b)residue found on the penis of a straight guy after fucking his girl in the asshole.
When Lance was done fucking Bruce in the ass, his dick was covered in fucking shit.
Bradley licked the fucking shit off of Steven's dick after he got fucked up the asshole. Yummo!!!
Charles was grossed out when he pulled his dick out of Stacey's ass and saw it was covered in fucking shit.