When my parents were newly married - my Dad was about to finish out his time in the military so they would be moving out of their rented home.
The landlord was going to be out of town and asked my Dad if he minded showing the new tenants around the property.
Dad had no problem doing that - so the couple came over and Dad showed them where everything could be found - and they finally got to the hot water heater - and the other guys asked - "What is that?" - A little baffled Dad explained that it was the hot water heater for the home. The other guy asked "Oh wow - how often will I need to fill that?" Uhhhhhhh......
How to respond.....
There really are people out there that enter their adult life being totally clueless about the world around them.
I would be the OP's co-worker grew up hearing 'Oh, let me do that for you'
'don't worry - I've already taken care of it' - 'Here is your homework' and very other similar ignorance enabling behaviors.
I work in college admissions and we are NEVER surprised when a parent:
-Calls to complain about their child's schedule
-Calls and demand to talk to the professor that is treating their child unfairly for missing class - and not allowing them to make up the assigment missed.
- Refuses to attend the parent orientation session because they need to be by their child's side in putting their course schedule together. Even though those are ALWAYS the very last students to leave the room and require the most assistance from the adviser. One mother caused her child to require 4 schedule overrides from the Registrar - and ended up having to come BACK to another program to get things straightened out - without Mom in tow.
Some parents are SOOOOO afraid to allow their child to learn a lesson through failure. Those same kids are totally devastated by the simplest errors - mistakes - and common failures. It's not uncommon to miss one of your first classes in college due to parking, room # change, confusions etc etc - but it definitely isn't something to physically BREAKDOWN over!
Those are the same people that need help from everyone around them to take care of the most menial tasks that life throws their way.
Heaven help them when people get tired of their ignorance and inability to care for themselves.
