Double the muscles
Some people have an extra "smiling muscle" in their cheeks that may create a dimple when it contracts. Are you one of them? Purchase a complete report on your genotype, specifically on dimples and their implications.
Why do cheek dimples exist?
Dimples might have no real purpose, or there might be more to the story. Some hypothesize that because dimples accentuate the smile they could provide a boost for communication. Primates evolved to live in complex social groups where cooperation is critical. Facial gestures like smiling are social signals, and primates — from macaques to chimpanzees to humans — use smile-like gestures to communicate things like submissiveness, friendliness, and playfulness.
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