Communication between men and women is largest happiness in the world. That's the cause why the process of association was brought to new levels by engineering growth of the past century. Now people can stay in contact with a dearest one who is even at the back of beyond. All that depends on the technological resources and needs.
Today most of you can not fancy their existence without prepaid phone cards as it proved to be so much handy. E.g., Australia calling cards assist to elongate the valuable time of association and save on long distance phone calls.