There's a vulture at the end of my bed

My boys and I are at my parents for Father's Day weekend.  On the way here, we started telling knock-knock jokes in the car.  Mr M made up one that's entirely inappropriate, so of course, I have to share it.

"Knock knock!"

"Who's there?"

"Your doctor."

"Your doctor, who?"

"You have cancer."


I'm seriously starting to wonder about that kid.