And while the cause of most of these sleep remnants is fairly obvious, the reason behind those sometimes-sticky, sometimes-crusty gobs of crud that can dot the lashes or cling to the corners of the eye is less clear.
Santa's Little Helper's initial appearance on The Simpsons was in the first episode of the series, Simpsons Roasting on an Open Fire, which aired on Dec. 17, 1989. Since then, he has become a recurring character.
The Simpsons shorts are a series of 48 one-minute shorts that ran on the variety television programme The Tracey Ullman Show for three seasons, before the characters spun off into The Simpsons, their own half-hour prime time show. It features the Simpson family, which consists of Homer, Marge, Bart, Lisa, and Maggie.