My name is Brandon. I'm 15 1/2, about 6'0 and only 106 lbs. I have been skinny for too long. I need a way to gain weight fast. My family and I are going on vacation soon and I want to look good on the beach. I also want to gain mass because I want to try out for basketball but being so skinny, the bigger guys just throw me around like i'm not even there. I have about a 3 months. Does anyone know the average weight i'm supposed to be and how I can quickly gain weight in time for my vacation. Please help. I am willing to do anything to gain the weight and mass.