I'm the same way.
My wife typically has dinner ready when I get home or it's cooking. If it's cooking I'll get a cookie or a small snack and wind down.(Usually on Pelican.
)
Tonight I was still on the job at 6 pm so I grabbed a sub and a bag of chips and had supper in my truck. I had told my wife to have dinner without me.
When I got home about an hour and half later I still grabbed some cookies and headed to the computer.
I wonder if it has anything to do with the venerable "afterschool snack" from when we were kids?