My step-mother-in-law is ga ga and she has this system where you dial A for this number and B for that number and so on. Trouble is, she can't remember whose numbers belongs to which letter so this is a typical conversation:
My phone rings and I pick it up:
Me "Hello"
Her "Hello! Stuart? (her son) You sound funny. Have you got a cold dear?"
Me "No, it's not Stuart, it's Julie"
Her "Julie? Oh. Hello. What are you doing at Stuart's house?"