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.
For the show dog, see Oscar The Grouch (dog) . Oscar the Grouch is a Muppet character on the television program Sesame Street. He has a green body (during the first season he was orange), has no visible nose, and lives in a trash can. His favorite thing in life is trash, as evidenced by the song  I Love Trash .