What are things that non-parents cannot understand?

My favorite part was

If you can understand that, you got it.

As the 2 year old at the next table pierces eardrums and throws stuff, and my childless date becomes increasingly unable to function properly, I can smile and laugh and eat, with exactly no inclination to move or leave. I will also laugh at the people who make shitty faces and comments.
I might then pick up the parents tab, and if you can understand why I’d do that then you’ve got it.

I can answer any question asked by a random small child in public. If you don’t know what your third favorite dinosaur is, or why you have a weird looking face, you wouldn’t understand.