Another mystery song- the Doors?

My sister used to have a tape of the Doors with one song at the end that didn’t sound at all like them, and now I’m pretty sure it was an add on. Anyway, I loved it, but have never heard it since (and the tape has disappeared). It goes a little something like…

How did you get so cooool
(breathy echo) so cool
(a few ties, with different adjectives)
(then faster)
blah blah a man…
something something… on his own

The guy’s voice is a bit gravelly (or was it the cassette?), Mick Jagger-ish.
I know how tough this is, believe me, but it’s worth a try. Ring any bells?

Guns 'N Roses - So Fine

Dang you’re good.

Who knew, all this time, I liked a song by Guns 'n Roses…