Homofoon grappen

Knock, knock. Who's there? Boo. Boo who? Don't cry, it's only a joke.

What do you call cheese that isn't yours? Nacho cheese.

Why did the maths teacher open a bakery? She was great at pi.

Why did the man fall down the well? Because he couldn't see that well.

Knock, knock. Who's there? Tank. Tank who? You're welcome.

I only know 25 letters of the alphabet. I don't know y.

Knock, knock. Who's there? Lettuce. Lettuce who? Lettuce in, it's cold out here!

Why did the bicycle fall over? It was two tired.