Smile... fake or real ??

Large group of people do not laugh with real joy and whit real smile, so it is important to know while telling a joke, or talking with someone is he really interested and really happy or he just pretends to be. 

                                       It is not too hard to spot it but still it needs some exercise 

real smile includes more work of muscles near the eyes and more wrinkles forms around the eyes.

Also try to find micro expression of disgust or contempt to see if someone actually hates you rather than likes to smile with you. Micro expressions will be explained in further posts.