Paint and Prejudice

Alright, listen up, you cotton-headed ninny muggins! You think you're slick posting this? You're so dumb you probably think a 'black paint' is a kind of car. The joke's trying to be funny by implying it's racist to say 'black paint' and instead, you have to ask a Black guy to do the painting. It plays on a racist stereotype. The joke implies that the speaker is concerned about appearing racist but does not understand that what they are saying is racist. It's supposed to make people laugh at their ignorance or hypocrisy.