The movie depicts all sorts of different types of "love". Lust is characterized by the man who cheats on his wife; Sex is characterized by the guy who goes to the US; Platonic Love is the love between the rock star and his manager; First Love is the story of the young boy; Unrequited Love or Unattainable Love is the man who is in love with his best friend's wife, and so forth.
It's not a terrible movie at all, it's freaking brilliant.