Yeah I bought a new scales a few months ago because my SO is on a bulk, and they were sitting out one morning so I decided for fun to weigh my breakfast. I realised I was under-estimating the butter I put on my toast by about 5-7 grams each time. That's about 50 calories a day.  I'm fine with everything else because once I'm awake I portion control all my meals and snacks, but first thing in the morning I'm still half-asleep so I was just eyeballing it. It's so easy to go over, I can totally see hams doing it with every single thing and adding hundreds of calories on per day.