[http://youtu.be/Xm-T3HCa618] (YouTube link)Last month, we posted How to Fall in Love, which described a process that tends to make people fall for each other. It consists of a series of increasingly intimate questions f...

Psychologist Arthur Aron set up an experiment in which two strangers, a man and a woman, met at the laboratory. They were instructed to discuss the answers to a set of 36 increasingly intimate questions, and then stare i...