Inventions the world can live without.
For me its the SNOOZE function on all alarm clocks. Now I voluntary deprive myself of 30 minutes sleep per day by setting my alarm for 30 minutes earlier. Then when it goes off I hit the snooze button, lie in bed with my eyes squeezed shut and wide awake, just waiting for the f..king thing to ring again, only to start the cycle from the beginning again 😡