During an interview onSiriusXM, Coulier described hearing the song for the first time.
“And I’m like, wow, this is a really cool hook.
And then I start hearing the voice.

I’m like, ‘Wow, this girl can sing.’
And I had no idea, you know, that this was the record.
And then I was listening to the lyrics going, ‘Ooh, oh no!

Oh, I can’t be this guy.'”
‘And that was my first thought."
So, has it been explicitly confirmed that the song is about Dave Coulier?

Not by Morisette herself.
A few years later, Morrisette went on to date Ryan Reynolds.
The pair became engaged in 2004 but ultimately broke things off in 2007.