| Welcome Lou,
Insulin doesn't make you fat, but it does make you hungry. As your understanding grows, keep in mind the objective of NOT feeding your condition(s). One example is exercising. You were probably taught to eat extra to cover the impending low. It makes more sense to cut back on insulin instead, but that's hard to do without good planning.
The cycle is subtle and vicious: shoot, eat, go too high, shoot to cover, get hungry, eat, go high gain, shoot, get hungry ... before you know it you're fat. Be strong willed. Ignore the hunger and exercise. | 
