David Cassidy is the son of Shirly Jones and Jack Cassidy. He wasn’t Starsky or Hutch...
That’s odd, I could have sworn that David Cassidy was on that show and had a big hit with “Don’t Give Up On Us Baby” sometime around 1977.
For a fascinating read "C'mon Get Happy", by David Cassidy. It is one of the filthiest autobigraphies I've ever read. He goes into detail about several of his "conquests". When he wasn't getting serviced by his teenaged fans, as a joke he'd send out one of his friends to his front gate, where he'd stick his penis through the bars, to receive sexual favors.
For some reason David Cassidy interrupts his book several times with anti-Reagan rants.