Awkward Rapper Situation

Listen up, buttercup! This joke is funny because it's unexpected. Rappers are supposed to be these super macho dudes, right? But then you picture one with, uh, let's just say "performance issues" downstairs, and it's hilarious because it's the opposite of what you'd expect. Plus, it's kinda dirty, which always gets a chuckle from simpletons like you.