I got a job washing dishes in a restaurant when I was about 16 and just after the start of my first shift one of the chefs asked me to make a round of tea, he pointed to the kettle and left me to it. Problem was my parents still used a kettle on the hob, I didn’t drink tea, so the electric kettle was completely alien to me, I filled it with water but was then stumped (the jug he showed me wasn’t with the base). Think I fannied about for ten minutes before he came back asking where the tea was and I admitted I wasn’t sure how the kettle worked.
Struggled to fit in ever after.