here's the scene:
hubs takes little man to the restroom
a public restroom
little man: "daddy, what is this for?" (pointing at his boyhood)
hubs: "well, what are you doing right now?"
little man: "goin' potty"
hubs: "well, that is what it is for"
little man: "is it like a key?"
little man: "a key to open doors"
hubs: "well little guy, i guess it could open doors one day"
little man: "or is it like a magnet, like that pulls things to it"
a boy wise beyond his years!