Eating is a social deal in every culture (as is smoking, doing edibles, or partaking in any other consumable, generally). It might even be an instinctive thing. I know when my wife isn’t around (often due to business) I’ll just make something simple for myself (like the stereotypical can of tuna) and when she doesn’t want to eat (migraines, etc.) then I feel disappointed that I won’t be making dinner for us.

Curiously, when it comes to dessert, I am a little sad if we don’t eat it together, if say, there’s pie and she had her slice while I was dogwalking or something.

And I say this as someone who’s eaten alone for most of my life. My usual thing was just to make myself one of a few staples and snack while playing video games. (This also led to a preference for food I could handle without flatware but also wasn’t greasy. Things wrapped in tortillas and carrotsticks.)

Now that I’m in the habit of prepping dinner every night, it feels weird when I don’t.