Who said "Maybe if we're nice to people, they'll be nice back."?

This quote is attributed to Butters Stotch.

Maybe if we're nice to people, they'll be nice back. - Butters Stotch

"Maybe if we're nice to people, they'll be nice back."

Butters Stotch Kindness

"I'm not bad, I'm just drawn that way"

"Aw, hamburgers!"

"You're grounded, mister!"

"I have to go do my chores now"

"A good man treats his wife with respect."

"Kindness always comes back around."

"The power of a smile can change everything."

"Kindness is weakness to some. Not to me."