There are a lot of pictures of KIM KARDASHIAN where she's not smiling.  But it's not because she's sad, or because she doesn't like her teeth.  It's all about preserving her looks.

Kim posted some pictures of herself smiling the other day, along with a caption that explains everything:  "See I do smile . . . even laugh on occasion.  Not too often though because it causes wrinkles."

If she doesn't want to smile or laugh, she should be safe tonight watching "Saturday Night Live."

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