When you eat too much you gain fat

Isn't that simple? Eat and live in moderation and sensibly and there will be no problems.
Use food for something else than nutrition or keeping your body healthy, trouble is on the way.
So break the fast and have your breakfast, eat some lunch and your supper. You might not need much in between but in case you do, have some fruit or nuts.
So what happens when you have a coffee date? Then you go to the movies and watch the game on TV.  You have a latte and a slice of something, in the movies you have your soft drink and pop corn, during the game you have a slice of pizza and a beer. You deserve it after a hard day. And what you end up with is double the calories that you would have needed otherwise. Using up the calories? Well, unless you do hard physical work  all day, sitting or standing around at work, sitting in the cinema and in front of the TV will not use up much.
I sometimes call North Americans the Dessert Nations. When I was a child, my grandmother used to love making delicious cakes and delights for us. But only on the weekends. During the week lunch and supper consisted of soup and legumes, or some simple main course, for breakfast some hot cocoa with a slice of bread or such.
Overweight children were very rare. Not every class had an overweight child. Size eight was the regular size that is now probably size four in the US today. There had to be a health reason like hormonal imbalance for the kids to be fat.
And now? Clothing sizes had been adjusted so we wouldn't feel so awful all at ones that instead of size 14 it only shows size 10. People are not at all well dressed and they do not know how to match their clothing with their natural colours and personalities. Why? They are more sluggish with less energy and it wouldn't even look good on them anyway. Just check the people on the streets. They are not at all those ones that eastern countries used to envy having a comfortable lifestyle.
So let's change that. NOW.