Smile: to assume a facial expression indicating pleasure, favour, or amusement. Characterised by an upturning of the corners of the mouth.
fake when in the morning I meet someone and I have to show
fake when I am in front of the mirror
I am objectively authentic when I go to the dentist and I am shining
I am a constructively authentic when after some efforts I feel satisfied with my friends
I am existentially authentic when I drink Tequila, there is a beautiful girl drinking with me and we wake up together with a sunrise.