Mind you I wasn't telling the guy he should NOT play with a pick, only that it's easier to hit such double notes playing finger-style and that picks aren't absolutely necessary when playing metal. I play mostly finger-style myself but I'll use a pick from time to time. I'd say I play roughly 70% finger-style, 30% pick.
Flea plays finger style, and when the bass comes in on Under The Bridge, it starts with a double stop, which is what we are discussing here, 6th fret G string, 4th fret D string
