What behavior of Ellie’s makes Debbie worried?

W: I’m a bit worried about Ellie. She’s nearly six and she still sucks her thumb!
M: Oh, Debbie, you needn’t worry too much about her. I’ve got a friend who has sucked her thumb for twenty-nine years’
W: You’re kidding!
M: No, honestly. She only does it when she’s really tired, but you can imagine how strange it looks on a grown woman.

W: I can’t believe this!
M: What happened, my darling? What’s wrong?
W: Someone must have gotten my credit card number and used it. I’ve got charges here that I never made!
M: But how could it have happened?
W: I know I haven’t been careful about receipts lately. Someone may have gotten my number out of a receipt in a wastebasket of some store.