Banana

 

And this reminded me of my favorite joke when I was eight-years-old:

"Knock Knock."
"Who's there?"
"Banana."
"Banana who?"
"Banana Banana."

"Knock Knock."
"Who's there?"
"Banana."
"Banana who?"
"Banana Banana."

"Knock Knock."
"Who's there?"
"Banana."
"Banana who?"
"Banana Banana."

"Knock Knock."
"Who's there?"
"Banana."
"Banana who?"
"Banana Banana."

"Knock Knock."
"Who's there?"
"Banana."
"Banana who?"
"Banana Banana."

Keep repeating this until the other person gets angry, then:

"Knock Knock."
"Who's there?"
"Orange."
"Orange who?"
"Orange you glad I'm not a banana?"

I never said it was a good joke.