Who said "Gratitude is what others should feel toward me."?

This quote is attributed to Cartman.

Gratitude is what others should feel toward me. - Cartman

"Gratitude is what others should feel toward me."

Cartman Gratitude

"Screw you guys, I'm going home!"

"I'm not fat, I'm just big-boned!"

"You will respect my authority!"

"Hippies, they're everywhere!"

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"