Mr Light wrote:
"You Oughta Know" was about Dave Coulier?!?!?!?!?!
That's the rumor. Coulier and Morrissette had a thing shortly before she hit it big with that album, but neither has ever confirmed that the song is definitively about him.
Coulier is just riffing on the rumor in the episode. "Why does everyone always assume its about me?"