Who said "Scooby-Doo proves that dogs are man's best friend."?

This quote is attributed to Scooby-Doo.

Scooby-Doo proves that dogs are man's best friend. - Scooby-Doo

"Scooby-Doo proves that dogs are man's best friend."

Scooby-Doo Love

"Scooby-Dooby-Doo, where are you?"

"Ruh-roh!"

"Like, zoinks!"

"Let's split up, gang!"

"I love my wife, but sometimes she drives me crazy."

"Love conquers all obstacles."

"Love is patient, love is kind."

"I'm not stupid, I'm just in love!"