Is There a Natural Bond of Friendship?

Friendship is a conventional thing. I'm friend with youtes, let's say, because we've got into the habit of seeing each other anda giving each other birthday presents and phone calls. But i think it's not just about arranging for people to be able to move house some way or other. We could do that in various ways, but the idea is there's something specially good about doing it by making these connections between people. That has a value in itself, over and above the help and support it organizes.