How weird (cool) is your body?

I've been within the 125-130 pound range (weight wise) for at least 8 years now. I've yet to gain any weight past or below that. I only gain weight by doing exercise (which is logical, especially when i do swimming and I bulk up like crazy). And along with gaining muscle weight, i eat 5 times more than anyone i know and have nothing to show for it- I am infinitely skinny and don't grow <-----like this---> . Anyone who ate the amount of food that i eat when I'm actively exercising would most definitely gain weight. The longest i've eaten continuously (yes one sitting, no bathroom breaks, continuously eating food) was 2.5 hours. i also had dessert after that.