Who is Mick Jagger from I'm with the Band and what is their importance?

Mick Jagger is Pamela's sexual fantasy come true. She describes him as down to earth, horny, and romantic..... all at the same time. Pamela captures his big lips, physical machinations, and charm on paper during her many rendezvous with him. Jagger, however, considers Pamela nothing more than a plaything.