One of the posters made me snort my morning coffee.
When I retired it was about the same time my son left school and was looking for work.
Since I had 3 wristwatches I told him he could have whichever of mine he wanted?
"why wd I need a watch?"
So you cd know the time"
He held up his I phone -I stared at it for maybe 5 minutes before the penny dropped