Let me express my take on this week's theme.
Here are the three basic expressions that we can easily tell in a human face.
Happy- we all smile when we are happy, aren't we? That is the normal expression, at least.
Sad- sometimes we cry when we are sad
Angry- the ugliest face? We tend to show off some wrinkles when we are angry. But we need to express it at times or else, our heart might explode!