The mayor of New York has banned people from shitting for longer than 10 minutes . The city administration has invested $4 million in smart toilets with timers . Entry is via SMS, QR code or a special card. Once inside, the countdown begins: — At 5 minutes, the music stops and the system announces that half the allotted time is gone; — At 8 minutes, a warning says time is running out and the door will soon open; — At 10 minutes, the lights start flashing, a final warning sounds