Divide by anything you can right? Generations, religion, etc.
My dad, who is of the so called silent generation, convinced my Gen X sister after she got married that hotdogs have to boiled with the water boiling from the outside edges of the pot to the center. She actually worked hard getting them to do that while her husband laughed his ass off.
I'm Gen X, when my wife fell asleep in the tub when she came home from work, I convinced her it was morning and she had to leave for work. I let her get in the car before telling her.
It's not a generational thing, we all like pranking.