Found this at Joe Bob Briggs' site. It probably wasn't intended as a Father's Day message, but let's not get distracted by details.
The World’s Second Shortest Horror Story
By Rebecca Brock and Joe Bob Briggs
The last man on Earth sits in a room.
There’s a knock at the door.
It’s his ex-wife.
And her mother.
Borrowed from The World’s Second Shortest Horror Story.
Happy Father's Day!