David: Yes, we are very good friends. We were best friends before we did Laverne & Shirley. We were best friends on Laverne & Shirley, and we stayed best friends after we did Laverne & Shirley.
David: Squiggy Caught Multiple Sclerosis and Didn't Tell Nobody!
In 2000, David was named the Ambassador of the Year by the National Multiple Sclerosis Society. He is spokesperson for the same organization.
David wrote an autobiographical memoir called Fall Down Laughing: How Squiggy Caught Multiple Sclerosis and Didn't Tell Nobody in 2000.