As long as I can remeber, I've had a gut that I can pull handfuls of flab off. However, 15, I'm 5'6"-5'7", and 130ibs, about average BMI. Why am I this way? It's not my diet, I don't drink soda often, candy, only often around holidays, and usually get some exercise. I found out air swallowing can cause this, when I was younger, 3 years old, I thought you HAD to swallow, saliva. So I often times swallow saliva many times through the day, and eat meals quickly.