Knock-knock jokes have been around since the first dad noticed the first door.
There are just 3 rules, and they’re very simple:
- You have to say knock-knock.
- The person at the door is not who you expect.
- You have to start telling your kids these jokes when they find it to be the most hilarious thing in the world and then continue telling them even when they’re an annoyed teenager and roll their eyes every time you do it.
Source: The Dad