Who said "Heh, heh, he said 'duty'."?

This quote is attributed to Butt-Head.

Heh, heh, he said 'duty'. - Butt-Head

"Heh, heh, he said 'duty'."

Butt-Head Humor

"That was cool."

"This sucks."

"Like, what are you looking at?"

"I'm like, so tired of this."

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."