At age 9-ish, I had to laugh and laugh when I heard the joke
Q: Have you heard the one about the bed?
A: It hasn’t been made up yet.
The thing is, you could have replaced the word “bed” with “snake” or “cloud” or “tropical storm” and it would have been just as hilarious to me because I didn’t get the pun of it, so for me the punchline was just “This joke doesn’t exist yet.”
*Sigh* Life was massively more surreal and psychedelic when I was a little alien (i.e., a little-bit-too-smart-for-my-age kid) and didn’t have context for a lot of things yet, so everything was just random (and therefore hilarious) most of the time. Ignorance truly was bliss.