Hello, I'm a 31 year old , 5 feet 10 inches, 145 lbs. I need to add about 20 pounds of weight. I'm trying to eat more and often ever 2-3 hours, but everytime I eat, I poop within an hour or so. Is that normal? How to gain weight for guys like me who go poop as soon as we eat? Please advise. Is poopi...