It's bad to steal other people's things.
Carl is at Monty's house and sees that Monty has gotten the same model bike that Carl has been eyeing.
Carl wants the same bike Monty has.
Carl saves up and gets the same bike Monty has.
Carl breaks into Monty's house when he isn't home and takes the bike for himself.
Carl and Monty ride their bikes together and have a good time.
Monty calls the police, and Carl is arrested when he's caught.