Fancy computer phones are great. They let us communicate, work, document, learn, complain, order dinner, find consensual sex friends, and plenty of other fun things. If I could attach myself to my phone with some sort of strange, dystopian umbilical cord-like apparatus, I would. But there is one thing you should never do with a smartphone: sleep with it. (No, not like that.) Take it from Melanie Tan Pelaez, an Australian woman who recently woke up with painful, second-degree burns on her arm.