Life is not static, but dynamic. In this dynamic life we have to move with different people and different environments. Since birth, a man has spent most of his life with his father, mother-in-law, and in the workplace. We also get acquainted and interact with different types of people in order to go abroad, travelling, in the streets or at shopping.
We also need to change the way we interact, depending on the people, the degree of one’s dignity, social status, education and so on. For example, in most cases, the way we talk or present things to the person we are subjected to is the opposite of our subordinates. There may be various reasons for this to happen, but without valid reason, this kind of roughness is more pronounced in our dealings with minor issues.
The Messenger of Allah (peace and blessings of Allah be upon him) taught and instructed us how to speak or behave with men in a ideal and beautiful way. In this context, there are several books on etiquette in Islam. We can greatly benefit from these books.
In most cases, a man or a woman behaves to her colleagues or superiors in a cheerful manner, smiling gesture and in a gentle voice. He/she rarely does this with his family, husbands, mother-in-law, parents, children, condolences or relatives.
Maybe there are thousands of reasons for doing this, but there may be very few reasons not to. We should keep in mind, people who are close to our smiling face are greatly missed.