Being human!

Why is it so difficult to share sorrow?

Why have not those famous philosophers written about how to share grief? The civics class tells you that man is a social animal. But why don't they teach you about how to converse with someone in grief. Why does the only thing that comes to my mind are the words "I am so sorry for your loss". But when it comes to joy, you have abundance of greeting card captions! Why do poems like Solitude make sense?

After centuries of existence, we have been able to define the rules and regulations for being social. But have we figured out how to be human?