Indian people believe in marriage, and marriage is not a time pass it is a part of social culture, we could do marriage not only time pass but survive of life. In hindu dhram it is a kram of human in our dhram sex is without marriage is against of our religion.
In marriage life the bond is not single there is multi type bond and the attachment is both physical and emotional. In marriage life both are responsible to each other, they understand their responsibility very well, but in live-in the relation only for needs and no more than cobwebs which they try to escape and the relation scattered like a pack of cards.