Why do we forbid ourselves to express feelings
Fear of being rejected. Once upon a time, a small child declared his needs and was not heard. Or, even worse, met condemnation, misunderstanding, rejection. Recollect, that to you spoke in the childhood. You can not cry. "You are a man! And men do not cry. " You can not laugh loudly. "It's not beautiful". To strike the offender in general is a nightmare.
joke;
There are two friends.
"Are you saying you got married?" So how is it?
"But how ... you can not drink." No smoking. You can not swear. You can not go fishing with friends either.
"Yes, brother ... well, do not you at least regret it?"
"You can not be sorry either."
For every "impossible" in childhood is a negative evaluation of a significant adult. And the child begins to form a belief that it's bad to be so, as it is. In fact, this is not even a ban on freedom of expression, but a ban on life.
Gradually we get used to hide true feelings in order to survive. We build our inner world, far from reality. In it everything is as we want. All characters behave properly. It's safe there.