Any manual contraptions that are out there (such as pumps) normally cause a lot of damage. I have heard many negative things about pills or supplements as well. Though I personally haven't tried them, they're normally a gimmick.

In case you weren't aware, the average penis size is around 5.5 inches, give or take. The sex industry has led us to believe that bigger is better, when, in reality, it's how you use it.