Butt cheek injuries caused by a door.
I hate touching door knobs with my hands and always use my forearm to rub against the doorknob in a downward motion using friction to turn the k**b. Was joking around with my gf saying I can open a door with my buttcheek exactly like how I use my forearm. Jumped at the door butt first and the little metal thing that guides the door cut my buttcheek (i think they call it strike plate or latch strike). The cut wasn’t a clean cut because the thing wasn’t that sharp. 30+ stitches.
After that she had to stand behind me holding a bowl to cover my wound every time I take a shower so it doesn’t get wet, and we live in a hot country so she has to do that twice a day for like a month.