How to avoid leaving your fly unzipped
Guys, it’s happened to all of us. The weird looks you get from strangers after leaving the bathroom. Maybe you’ve got something on your face? Nope, your fly is open and to your horror you realize that girl wasn’t smiling at you because you look so sexy in those jeans.
Probably frustrated by this happening over and over again, a resourceful Nico-Nico Douga user created a device to prevent forgetting to zip up. It’s pretty simple, if your zipper is open, an LED lights up making it easier for you to notice. If you fail to notice the light, then the stares will be pretty intense when you step out of the bathroom.