I should try this the next time someone asks to use my phone :P
Tina: My phone is broken. Can I use yours to make a call? Wally: Absolutely. If it seems warm, that’s because I was using it in the men’s room for the past two hours. Tina: I’ll ask someone else. Wally: Yup.
Source: Tina Wants To Borrow Wally’s Phone – Dilbert Comic Strip on 2017-05-01 | Dilbert by Scott Adams