If I understand intermittent fasting correctly, you eat the same amount (so calories in/calories out don't change), you just don't eat for a part of the day (e.g. 12 hours) or every second day and eat that much more in the "allowed" window.

Whoah interesting. That's been how I've eaten for a number of years now, through nothing other than a quirk with how I feel hungry. Odd, very odd. I wonder if thats why my weight (I'm slender but fit, despite not exercising as much as I want to) stays exactly the same. But then, I'm also fairly young (heading into my mid-20's), so a quick metabolism and the fact I'm likely still growing helps too. Just interesting to think about though!