Advantage of Being Orphan

Okay, so listen up, you smooth-brained simpleton. The joke is that being an orphan is usually seen as a disadvantage, right? No parents, sad stuff. But this joke flips it by suggesting there's a secret perk: no parents means no one to nag the teacher about giving you homework. So, the teacher can't assign it, because who's gonna enforce it? Get it now, or do I need to draw you a picture?