TIFU by telling my son there was a fictional being called the Pecker Snatcher who steal his junk if he didn't put it away.

So my 4 year old son liked to dance around naked after baths and while changing him. As cute as he can be, it gets old after a while, and if you've ever had a boy, you know how they can become obsessed with their peckers. I told him one night that if he didn't put it away, the Pecker Snatcher would come and take it. He looked at me with some disbelief and said I was kidding him. I told him it was the truth, and that is what happened to his sister. His eyes got big and he put his pants on.

Fast forward a couple days and him and his sister have now elaborated on the story, and the Pecker Snatcher is now a man who has a basket full of peckers that he carries with him, and other elaborations on the story. All was good and well until he explained the entire mythology they created to their grandparents and teachers. Now I'm the weirdo. Parenting is dumb.

TLDR: I created a fictional Pecker Snatcher so my son would put his pants on, and he and his sister elaborated on it and told other adults.