(I’m on a flight with my grandmother. She is hard of hearing, so doesn’t always realize how loud she is. I’m sitting between her and another passenger who has been ordering a lot of drinks throughout the flight.)

Grandmother: “That man has had a lot to drink. You’d think he’d need to go to the toilet by now!”

Me: *trying to change the subject* “Uh-huh. Is your leg still aching?”

Grandmother: “Maybe he’s wearing a catheter!”

(I turn around and see the passenger facing the window, shaking with suppressed laughter. He mustn’t have minded though, because the next time the cart came past he offered to pay for our drinks too!)