South Park, Season 4

Cartman:
T-Tooth? What the hell? Mom!

Liane:
Yes, Eric.

Cartman:
You know, the tooth fairy forgot to bring me money last night! Call the police!

Liane:
Oh. Eric, poopie, sit down. Mommy has something to tell you. It's just that...well... There is no tooth fairy, Eric. I've been putting all that money under your pillow, and because you had so many teeth fall out, I've actually run out of money and can't go to the grocery store for at least a month.

Cartman:
You almost had me for a second there, Mom, he. "There's no tooth fairy." I suppose you're gonna tell me there's no Santa Claus, Easter Bunny, or Jesus, either, he-he. M-Mom?

Liane:
I'm sorry, Eric. All children find out sooner or later.

Cartman:
Y-you're serious here. There really is no tooth fairy?

Liane:
No, honey. It's just--

Cartman:
How could--? How could you lie to me, Mother? Lie right to my face?

Liane:
Oh, Eric, it's just part of being a child.

Cartman:
How can I trust you? How can I trust anyone ever again, Mother? I guess, uh to make it through this life, I can only trust myself.