I have to agree with Dredd, Drake galley used to have that off to a fine art! In the days when boats and ships alongside got muck on a truck at least there were no surprises, it looked shit, tasted shit and, in fact, was shit.
Not necessarily for me though, although I have been close from time to time. You know what they say "Q. Why are keeping secrets and cunnilingus the same thing? A - One slip of the tongue and you're in the sh1t!"