When you’re a kid, the babysitter relationship is a triangle:
The parents going out
The kids staying in
The babysitter coming over
You might not consider who the babysitter actually is or what grade he is in or what she studies in college.
There are more important questions like will she let us eat snacks? Does he like to play video games? Will there be pizza? Can we stay up late?
When you’re the parent going out for a night, the situation changes.
The triangle becomes a square.
The parents going out
The kids staying in
The babysitter coming over
The babysitter’s parents
So you have that lingering I hope all is well at home feeling while out for the night, but someone else is thinking the same thing about their own kid, the babysitter.
And now you’re thinking the same thing about the babysitter because you know the other parent is probably thinking the same thing about your kids.
As Paul Graham describes it:
I suddenly felt protective not just toward our child, but toward all children. As I was driving my wife and new son home from the hospital, I approached a crosswalk full of pedestrians, and I found myself thinking “I have to be really careful of all these people. Every one of them is someone’s child!”