Most of my life, up until my late 20's anyway, I just ate when hungry. When I ate, it wasn't heaps, but it was good simple food and plenty enough for me. My family pretty much gave me hell over this, with the "you should eat 3 meals a day" stuff. In the 80's and 90's everyone was also worried about anorexia and bulemia. I was neither of these (my sister was bulemic though). I was always very physically active, a tom-boy type, "stocky" (muscular) 5'3" female around 55kg.
I tried to respond with "you don't try and fill up your car when it's full of fuel, do you?" but still I copped the grief. So eventually, I succumbed, and did the 3 meals a day thing from about the age of 30. It did take a few years, but now I'm 43 years old and weigh 76kg, and boy I wish I had listened to my own body instead of what everyone around me pressured me with. I have been trying all the usual prescribed ways to get back to where I was for years, and nothing has worked.
David's book was music to my ears. What he's described is how I always used to eat. So familial pressure be damned, I'm going back to eating how I used to, how it suits me and my body, and as it turns out, I was always in line with the fructose/sugar free thing. Having read "sweet poison", I understand now the physics of why what I always did worked, and that's good enough for me.
Stick with it people, whether you lose weight or not. This is the way to eat, live, and enjoy your life!