Extra Miles

I am wondering how many people actually are willing go for the extra miles for others.. It maybe not difficult to go for the extra miles for your own family, but how many actually are willing to go for the extra miles for other people outside of your family?

Going for the extra miles is tiring, so most won't do, as it is enough tiring to go by daily lifes... If one won't go that far for another person who actually did it for the one, what meaning is left in the relationship?

But when most of the people won't do this for others, the extra miles that one does will make it more precious and valuable, because it is scarce, it is not common...