Avoidance Behavior...?

Though we've moved on to Doctor Fuastus' rather silly shenanigans, I am still trying to think of why anyone in their right mind would sell their soul to the devil. We were instructed to think of his past. In our last class, we established that he obviously has nothing else to live for, hence his decision to sell his soul to the devil. He's some lonely guy who has nothing better to do than decide to learn all he could about hell. I'm sure if he had a wife and children, he'd be too busy chasing them around to even think about writing away his soul with his own blood. Or maybe he's just some pompous and prideful guy who decides being a doctor just isn't enough ( not enough accolades *rolls eyes*) to feed his ego. Either way he still has way too much time on his hands and no real friends because a real friend would have surely knocked some sense into his head (I hope). Obviously this guy has some serious issues. Anyway I found this cartoon and thought it fit Doctor Faustus so well...

It's not too funny if you don't know what avoidance behavior is, so I did some light research. Basically, avoidance behavior is someone who is socially inhibited, is sensitive to negative criticism, struggles with feelings of inadequacy and avoids social interactions. People with this issue are lonely, anxious, and isolated. I think Doctor Faustus fits the bill. He avoids the world (i.e. no wife, no kids, no friends), becomes isolated and lonely, and then decides to sell his soul to the devil.