Question: who was you oughta know written about?
Answer: Dave Coulier Says Alanis Morissette's 'You Oughta Know' Is About Him. After nearly two decades of speculation, actor Dave Coulier — aka goofy "Uncle Joey" from "Full House" — is finally confirming that Alanis Morisette's hit breakup song "You Oughta Know" is indeed about him.