I think the "cementing" is a plausible point. If one looks at it from a modification standpoint, one could vaguely compare, possibly, piercings with the issues at hand. With piercing, after a certain stretched size is reached, the tissues will have the inability to close the pierced area, therefor a permanent modification. Now when the issue of a body builder is brought up, one is referencing to muscle mass and if medical research has any bearing, the penis isn't a muscle, but more of a tissue of skin, vessels, and cartilage-like structures. I'm just somewhat up in the air with what works and doesn't, but I'm still very open minded. And with being 19 with 7" I think I'll have plenty of time to encourage increasing of some sort: be it girth and/or length...