This is probably a weird question,but I was looking through my pictures and I realize I smile with my mouth open in all of them, meaning I show my teeth, looking on Instagram I often see that a lot of girls don't show their teeth, it's like a smirk.
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I usually smile with my mouth closed. Just don't feel like showing my teeth. I don't have ugly teeth. I just don't feel like I look good when smiling with my mouth open. Personal taste. But anyone can smile however they want. Their choice.1