No acually!
It could be a fake smile...
It could be just once in a very bad day you may smile at a really bad joke,
It may be a number of things that could make you
smile
Happy and
Smile are too very different things once is to make a half circle in ones face the other is to be not sad to be joyful and Happy...
I disagree with you locking my post...
they are two very different things