This is how my partner eats - he likes cooking, so we'd have a lovely time cooking together, but when it came to eating, he'd faff about and get distracted and then take ages serving himself, then get up and faff some more, then start eating, then stop, then get distracted again, etc.
It used to drive me CRAZY. I'd sit there thinking ffs, can't you just EAT like a normal person? So I had to do some serious introspection about why this got to me so much. It wasn't affecting me, I still had my dinner and could eat as much or as little as I wanted, but it bugged me. When I really thought about it, it was about me and my relationship with food - I had all these parental voices telling me to eat up, clear my plate, stop messing around, etc. But I'm an adult now. I can eat or not eat whatever I want, and I don't have to impose all these illogical moral values to eating.
The bottom line is that I am an adult. What and how I eat is my business and no one gets to tell me its wrong. For no real reason, our society has decided that three meals a day, one of them hot, eaten in a given time frame is "right" but that's convention, not some unalterable law.