Anyone who thinks it involves the deliberate wiping of shit with fingers on a partner's face is a know-nothing fucktard.
my ex-boyfriend gave me a dirty sanchez at a party and said he cleaned it off but he didn't so when we came out of the room every one laughed at me! : (
I guess i should wipe my ass better.
Johnson: What? What makes you say that?
Tom: I noticed a little hair on her lip.
Johnson: Are you serious?
Tom: No, but I totally gave her a full "Dirty Sanchez".