You noticed any child acting like this?
Even in workplace, I worked with people who always laugh for silly jokes or minor / non-sense things.
At surface, they seem happy for live and optimistic for everything, but I just knew they are masking their insecure / shame and guilty by fake happiness.
That’s why we heard stories from time to time, mentioning this or that person seems happy all times but how come they commit suicide or doing horrible things to others suddenly.
What do you think? You met someone like this?