Ask this question; "Do you look at the bog roll after you've had a dump?" Yes, the quizzee is a "scummy dinnerstabber" or a "dirty gaylord" or even worse, a "knobjocky", who enjoyed nothing more than looking at shit. No, then how the hell do they know their arse is clean, the filthy fucker? Escape through excess "yes, and I lick it off for supper" (not to be tried if you aren't all that popular), or by lying "no, we're so rich that we get butlers to come and look at our toilet roll for us". Or, by simply avoiding the question altogether, and running away.