Good Lord that was depressing. Joel asks, 'Why do I fall in love with every woman I see?' But he doesn't fall in love. He doesn't know what love is which is reflected by his zero self-esteem. He has no love for himself let alone another person. He doesn't love Clementine, he's just sad because nobody is around to 'love' him.

Clementine is equally damaged. She's not eccentric or quirky, she's simply psychologically damaged like Joel. The only reason they got together was because she was insane enough to approach him. No sane woman would have had anything to do with Joel.

Hence why their 'relationship' is always doomed to fail. These are people who don't know how to love looking to others to do the work that they don't know how to do.

There's nothing sweet or romantic about this film. These are two very damaged people walking around the earth as potential time bombs ready to go off.