Sometimes, i think humans should have been a telepathic race. So many things would become so much simpler. No-one would ever have to be ALONE. A well meaning stranger could simply knock on your mental barriers and cheer you up. There would be no false emotions, since those would easily be caught. A smile would convey the true happiness or sadness which is presently hidden behind the barriers of our minds. And no-one, not a single person would be alone.