Wizards study some pretty heavy stuff, and the mystical mumbo-jumbo they're always spouting sounds like gibberish to anyone who has no knowledge of the mystical arts.
And aside from the incantations, transmutations and summoning rituals wizards are just regular people-they deal with relationship issues, have trouble making friends, and can't find a decent pizza parlor that will deliver to their tower.
But, as this Slack Wyrm comic shows us, if you should get to talking to a wizard and they ask you to babysit just say OH HELL NO!
-Via Geeks Are Sexy