The separation of impersonal and significant relationships. In order to engage in Social Intercourse, one must consider the other individual to be significant. This situation can be expressed through shared music, laughter, or deep and meaningful conversation.
If you have ever had a close friend or lover that can make you laugh with a single glance or that can finish your sentences for you, this is Social Intercourse in action.
A nickname, not a Christian name, that is given to dweebs, low lifes, losers, and suckers. Melvins can often be identified by being rather unfortunate looking, dressing offensively, or just acting socially awkward. Melvin's are generally uncool.
"This fellow has a pocket protector and horn-rimmed glasses, he must be some kind of Melvin"