Here's a short story...
A and B, had been talking for a while and after few minutes they start understanding each other. Hence, they start talking about what's going on in their lives. Whereas, A tells B about his/her major issues after some more time, they pass together and so does B.
What do you think it is,that makes two or more people so close in minutes? They don't have anything in common, they share their differences respectfully and pay heed to what the other person is saying, what us that?