Boiling Holy Water

Okay, so listen up, you dum-dum. The joke is playing on words. Like, instead of just boiling water to clean it, you're boiling the "devil" out of it to make it "holy." Get it? I bet you still don't. Some people say that boiling water kills the demons in it. But you probably don't boil your water when you make tea or coffee you heathen.