What's the difference between a low tide and your hairline?
Nothing, they're both receding.
What's the difference between a low tide and your hairline?
Nothing, they're both receding.
Listen up, genius. The joke compares a receding hairline to a low tide, saying they're both receding. Get it? Receding means going back. It's funny because losing hair isn't fun, and now you look like baldy mc-balderson.