Here are some randomly selected joke topics beginning with the letter 'I'
Idiot
Your child may be an honor student but you're still an idiot.
Idiot
You must must think I'm the perfect idiot.
No, you're not perfect.
Idiots
Did you hear about the idiot who put his radio into a refrigerator?
He wanted to hear some cool music.
Idiot
You must think I'm a perfect idiot.
No, you're not perfect.
Idiot
I'm not a complete idiot, some parts are missing!
Ice cream
What do you get if you cross a football team with ice cream?
Aston vanilla.
Iceberg
Never mind the Titanic - is there any news of the iceberg?
Idiot
Did you hear about the idiot who called both his sons, Ed?
He thought two eds were better than one.
Idiot
Did you hear about the idiot who planted pennies in his garden?
He wanted to raise some hard cash.