Chocolate Canal
Anus and intestines thereafter, because shit looks like chocolate to the people who make this sort of stuff up, and its the canal that the shit goes down to come out of you.
"So, I heard you like having it up the chocolate canal"
"Look, I'm not gay, I don't like you, so just piss off."
"Look, I'm not gay, I don't like you, so just piss off."