Like I said... I can guarantee you will gain weight eating ridiculously excessively. I'd be willing to bet you money on it. Your statement of "there is absolutely nothing that will make me gain weight" is completely ignorant on more than just a biological standpoint.
There is no possible way......
Trust me - I've tried it.... Back in 08 I did nothing but eat fast food 3-4 times a day for like 6 months and I didn't gain anything.
My dad is the same way...
Well you're lying and you're wrong, because as any bodybuilder will tell you, even the skinniest dude with the fastest metabolism(and there are a lot of them in that community) can pack on weight and muscle by following certain eating guidelines, none of which even begin to approach 50 cheeseburgers a day in caloric consumption. So yes, you're full of shit. I have no doubt you can eat a lot without gaining weight because a lot of people are like that, but you're full of shit when you say nothing could possibly cause you to gain weight. It's ignorance embodied.
Take this to heart though, Super Human Nick. If you're really as much of a medical marvel as you say you are, then you're going to die much sooner in life. The faster your metabolism, the faster your cells wear out and the quicker you'll die. Most animals have shorter lifespans than us because they have a ridiculously high metabolism compared to us. And those that live longer than us, have a much slower metabolism.
So, you better get in all the super hero ass kicking you can before you croak!