Orphan: I want to be a relator.
Teacher: Why?
Orphan: Because I never had one in my childhood.
Listen up, buttercup! This joke is a knee-slapper because the orphan kid wants to be a "relator" (like, a real estate agent) because he's misheard it for "relation." See, orphans usually don't have much family, so it's funny because he thinks being a relator means he'll finally get some relatives. And you, my friend, probably think that a balanced diet means holding a cookie in each hand.