Introduction (cont’d)• A smile is a facial expression formed by flexing the muscles near both ends of the mouth and by flexing muscles throughout the mouth.• Smiling is something that is understood by everyone despite culture or religion.
Introduction (cont’d)• Many biologists think the smile originated as a sign of fear, tracing the smile back over 30 million years of evolution to a "fear grin" stemming from monkeys who often used barely clenched teeth to portray to predators that they were harmless.
Introduction (cont’d) “Frown and you frown alone, BUT smile and the whole world smiles with you”
Types of SmilesMost smiles are happy signs. They speak of joy,happiness, love or even pride. However, thereare smiles that can also be an involuntaryexpression of worry, otherwise known as thegrimace, or an expression of embarrassment .
Types of Smiles (cont’d) It is hard to say no to the request that accompanies it.Sweet Smile
Types of Smiles (cont’d) Simply BreathtakingMost Beautiful Smile