Personal anecdote: I eat quite fast and I have no troubles keeping my weight at a stable 75kg at 178cm height. Secret? Well, I know generally how much I eat, so

Personal anecdote: I eat quite fast and I have no troubles keeping my weight at a stable 75kg at 178cm height. Secret? Well, I know generally how much I eat, so that's how much I put on my plate. When it's finished, it's finished, no matter if it took me 5 or 50 minutes to munch through stuff. And of course, if I sometimes give in and consume a lot of pizza, ice cream or similar - I will see my weight go upwards, even if I eat that pizza veeeery slow...