Why did Bill Cosby wear sweaters in the Bill Cosby show ? – Entertainment & ArtsReport
Often, the creators of a TV show will have the characters dress in a certain way. Of course, that does not mean the person who plays the role (in this case, Bill Cosby) dresses that way in real life. The creators of the Cosby Show wanted the character (Cliff Huxtable, a doctor) to look casual but professional, and sweaters were a popular fashion; many professionals who lived on the east coast back in the 1980s wore sweaters.