I like to imagine that the conversation between the guy getting tattooed and the tattoo artist went something like this:
Guy: This tattoo is looking pretty good! I think it could use more shading though....
Tattoo Artist: More shading? Are you sure? I think it looks pretty good as it is.
Guy: (stares menacingly at the artist) I said. More. Shading.
Tattoo Artist: Ummmm.....ok, but don't blame me when your baby starts to look like Mr. T.
Guy: I'm not paying you to talk. Just keep shading.