1. He needs to poop
  2. He's lonely and wants my attention
  3. He wants to have his ear scratched
  4. He's begging for scraps from my breakfast/lunch/dinner/mid-day snack
  5. He's bored
  6. He wants a drink and is too lazy to get up to walk to his dish
  7. He likes to be annoying
  8. The cats have taken over and he needs to reclaim his territory as man of the house