When any of the child is in its infancy he is completely unfamiliar with the complete world which is around him and as well as from the remaining outside world too which is apart from his own house and he became familiar with all these gradually with the passage of time during his childhood and adolescence days. The very first thing which has been taught to the children all over the world after they became quite capable to understand something easily and very well are the relations, the child has been taught that among the few specific peoples which are the family members of him/her, that who are the parents (father and mother), siblings (brother and sister), grandparents, uncles, aunties and cousins of their own, this is the matter of parental home.
And later on when the child goes to the native home of his mother there he/she becomes familiar with its own maternal grandparents, uncles, aunties and cousins and in case the grandparents also had siblings then the other relations apart from the parents get broader. In the life of own all of us had various sorts of relations along with the personal ones which are stated above, when one leaves his house and personal life and arrives in the remaining world for getting education in school he/she had friends and this relationship is called friendship; the various sorts of relations that all of us have until that time among them the friends are the best ones for us and we share all of our things, matters, feelings, desires etc. with our own close friends only.
Later on after being free from studies and juvenility of our own when we became a youth most of us starts searching for a mate for our own with whom we could share all of our those things that we share with own friends earlier, the mate with whom most of the people are in relation are one of its friends only and afterwards as like other peoples all of us get married with anyone and later on as like our parents we also became parents and have children of our