Africans and Lightbulbs

Listen up, buttercup. This joke ain't rocket science, but clearly, it flew over your head. It plays on a nasty stereotype, see? The punchline? It implies Africans are so desperate for resources that they'd use a water bottle instead of a lightbulb. Now, I know you're not the sharpest tool in the shed, but even you should get that it's not cool to make fun of folks based on their background.