Think of the 1988 Full House Christmas episode, for instance, where it appears nearly every member of the family is wearing a festive turtleneck/sweater combo. Santa, save us.

The festive Christmas turtleneck was worn by many a mom in 90s and early 2000s sitcoms and movies — like Jamie Lee Curtis in Christmas with the Kranks. (IMDB) Why the turtleneck? In the past two ...