[ Family ] Open Question : Why don't girls have pee pees?

My dad told me that girls used to have pee pees but after playing outside in the rain their pee pees got rusty and fell off. I'm not sure if i should believe him though. For one, he turns all the dials on the stove towards "ON" when he isn't using it. So, he isn't the "smartest deal at the flea market" if you know what i mean.