Hard, but not impossible. Especially not when you chose low-fiber calorie dense (fun/fast) foods. Scarily easily in that case.
After all these years I'm still surprised how I can eat 1200 kcal in 3 meals one day and be content and then pack away 4500 kcal another day in 3 or 4 meals and still have space for more
.
It teaches the importance of calorie tracking when there's such poor feedback of satiation/satiety (forget difference between those).
This is the main reason why some do better on less meals and others who both feel full quickly and then get hungry again quickly too, do better on more meals.
It's galling when you've been told that eating 5-6 times/day is the only way to be able to drop wt easily, and find out 3-4 yrs later, to discover you've been told a lie.