I've seen or read a documentary on penis enlargement surgery once... from what they told, I don't think your dick is in for heavy-duty use after it. They lengthen it by snipping off some sinews or connective tissue holding it inside, and then sew it on somewhere lower again, thus bringingn out more length. Physical conditions therefore also limit the range of additional length to less than an inch, and moreover, you can't tell me the new connections are as tight as the older ones have been. I'm glad I don't need it. Don't like the thought of scalpels and other surgeon instruments near my genitals.
Bruce