Because you can knock a door with your hand down as well and it would be more convenient?
In: Physics
I knock on a closed door with my arm up, but if I am knocking on an office door that is cracked open and I’m knocking to alert the occupant that I’m in the doorway, I knock with my arm down with the knuckle of my middle finger
Have you actually tried knocking on a door with your hand down or are you just basing this question based on the showerthought that showed up a couple of days ago?
Yeah you can do it, but it’s nowhere near as convenient and you can’t knock nearly as hard/well with your hand in the below position and depending on how sensitive your joints are it actually hurts a bit knocking on the door from below then it does from above because you use your MCP joints to knock from below which are more sensitive, instead of your PIP joints.
I always assumed it was because old doors had door knockers
Then it just became habit by humans
Latest Answers