Do not let him stand watch.

Do not trust him to deal with a butterfly.

Do not believe him when he says that he's not a goat pooka.

Do not let him ramble on about himself for more than ten minutes.

Do not encourage him to speak.

Do not indulge his harpy fetish.

Do not sell him date-rape drugs.

Do not give him a steed... he can run.

Do not leave him alone in a bar.

Do not leave him alone with the girls.

Do not let him leave your bed in the morning without getting his name, address, and SSN.

Do not expect him to remember the names of all of his bastard children.

Do not believe anything he says about the "Misha-Moosha Mountains."