Booty Drop Disease

So we are leaving a restaurant and Reese sees an interesting pile of something on the curb. She puts her fingers in it and smears it. "It" was bird poop.
I start doing what any medical person does... Contain the mess and start cleaning.
Me: Reese, why did you put your hands in something you have no idea what it is. Birds have nasty things in their poop. Like histoplasmosis. Which she was like whatever.
Josh then does whatever non medical parents do. 
Josh: Reese, birds give you a disease called the booty drop disease. When your booty falls off if you touch bird poop.
Reese: What!!!! And starts crying hysterically.
Awesome fake diseases are way more scary than real ones.
(I did inform her that it wasn't real and dad was just "tricking" her like she sometimes does us.)