I was sitting in my junior high Health class some decades ago and my buddy Ramzy was next to me. It was sex-ed. Now, Ramzy was one of those kids who moved from Lebanon when he was ten or so. On the surface, he sounded like he spoke English just fine. In reality, since he never heard it at home and most of his friends were Arab, he severely lacked academic English. I would encounter a lot of kids like this in my later teaching career. If they're talking about LeBron James or Drake, they sound like they're native speakers. If you give them an assignment, they can't understand the directions.
Anyway, miss Mix is showing a slide of the female reproductive organs and explaining where the aynus is located. Ramzy puts his hand up and say "Miss Mix, ain't that actually the *******?" She frowns and says slowly, through her teeth: "No Ramzy, that's the aynus." She tries to continue, but he puts his hand up again. "Yes, Ramzy?" "Yo, miss Mix, if that's the ah-nus, where the hell do girls have their assholes then?"
Cue trip to the principal's office even though I swear, he wasn't kidding.