He seemed like a very functional porn addict to me. He was able to satisfy his porn need. I thought his pain seemed a little disproportionate to his problems with being a sex addict and felt there was something more going on. I thought perhaps his sex addiction was merely a consequence of his obvious intimacy problems. For some reason, he can't let other people in and it seemed to me that sex addiction had developed from that loneliness rather than the other way round. There's also a scene where his sister says they come from the same place, and she's suicidal, so that also led me thinking that both characters have some tragedy in their family background.

Yet the movie never really explores that part of their pain much. It focuses more on the sex addiction which felt superficial to me.

Or what do you think? Was sex addiction his biggest problem?