My Mouth Speaks..Emotions

can one eventually lose thier basic emotions?
can a smile really affect that badly?
whats the purpose for emotions?
people tend to take it for granted when they see one smile..
but do they know how much does it take to smile for some?..
when everything's so numb to you..
do you feel as though a smile is more of a mask named polite?
isn't it a little tiring to smile everyday emotionlessly?
thus...
i've forgotten how to smile..