My mother's like this. She's a cooking fiend, loves to push the food on you. But at dinner time, she eats by "tasting" her cooking. And then she's full. Meanwhile she keeps urging you to have seconds, then sends a doggie bag home with you. Thankfully she's supportive of my diet, and cooked fish and veggies this Sunday, and made sure to give me only a small plate's worth. She was a bit put out I wouldn't take the rest of the fish home though. It was sea bass, my favorite; it would've been gone by bedtime.
Me, it's been over a decade since I could actually recognize "hunger". I got to this weight by scarfing down tons of junk, but there were also days I'd forget to eat at all. Never noticed any symptoms. Now on this diet, I struggle to avoid the restaurants and candy aisle, but I also have to keep a log of when I last ate, and eat every three hours on the dot, or I'd starve.