Because they won't fall for the same trick twice
The Son is attracted to black
Dark humor... I hate it when black people tell jokes.
Ms? They keep falling through. If that's not offensive enough, replace it with black Jesus and skittles.
The tomato was in a can.
They're not falling for that again.
Araba-cadabra
It only takes two, but the trick is getting them in the lightbulb.