It's the way of the world, son

The other day when I was, er, occupying a stall in the restroom at work, I overheard this adorable conversation between a father and maybe his 4 or 5 year old son:

Boy: Hey! It smells like lemons in here.
Father: Just stand right there, ok?
Boy: Ok.
Father: Hey! No no no! Don't touch that. It's dirty.
Boy: Dirty?
Father: It's filled with dirty pee.
Boy: (incredulous) But it smells like lemons!
Father: They make it smell that way, so that you don't smell the pee.
Boy: Wow!