I hate showing my work. It’s time-consuming, (like Nate said) and can drive me crazy if I make a mistake showing my work but still get the correct answer.
One of my friends wore shoes in their house. They never did, until a uhaul driver crashed into their house, and his family had to wear shoes for a while due to the broken glass that was on the floor
That has happened with my peanut allergy when in kindergarten. I had to be taken to the Emergency Room.