It's disgusting to bust a nut on someone else's clothing.
James is mad at his roommate for eating the last of his Froot Loops.
James wants to punish his roommate for eating his food.
James keeps whining to his roommate until he buys James a new box of Froot Loops.
James goes into his roommate's room while he's at work and masturbates on the roommate's favorite shirt.
James enjoys his cereal and his roommate decides that taking his food is too much trouble.
James' roommate is revolted and breaks his lease to move out, sticking James with the full rent.