Using weights to enlarge your penis is nothing new. In African tribes, it has been done for thousands of years. The male usually started at a very young age. Progressive heavier weights were hung on their penis, thus stretching it out.
Gravity plays a huge part of this enlargement method as heavier weights stretch the penis further. The problem is though, as the penis gets longer, the girth decreases to compensate for the length increase.
Weights can also cuts off circulation to the penis and surrounding areas, creating unsightly stretching marks and cause loss of sensation in the penis head.