A childhood belief about cars

When I was about 6 or 7, my father and I were driving in his car and he used the window washer fluid to clean off the front window. Curious, I asked him where that water came from. His explaination for it was that there was a little man who lived under the car hood and peed upward to clean off the window. Everytime after that, when he used the window washer fluid, I was always say 'Its the little man, peeing again.' and then he would always go 'Yep, thats right' and smiled at me. I believe his reasoning behind it for about a year until my mom finally told me the real story about window washer fluid and where it came from when she overheard me telling my dad that the little man was peeing again. I have yet to fully forigve my father for that one, he's still pulling stuff like that on me.