Did you hear about the deaf guy's STI?
He got hearing aids.
Did you hear about the deaf guy's STI?
He got hearing aids.
Listen up, buttercup. The joke plays on the double meaning of "hearing aids." You see, the deaf dude didn't get help to hear. He caught an STI, and because STIs are often called "aids," he got hearing aids, get it? It's funny because you didn't get it at first, you silly goose.