#4: The Truth Door Test
This bathroom door tells on you. Skip the sink, and you’re stuck grabbing the giant “didn’t wash hands” handle. Do the right thing, and you get the dainty “washed hands” handle. It’s the ultimate public shaming system—clean hands earn the VIP exit, dirty ones get exposed instantly.

It’s funny, but also brilliant psychology. Nobody wants to be seen walking out clutching the germy cheater handle. The setup forces you to think twice: do you really want everyone knowing you skipped soap? In the battle of hygiene versus laziness, this door makes sure soap wins every time.
