I just watched an interesting documentary titled My Massive Cock, and it profiled a bunch of guys in the UK that talk about the trials and tribulations of living with a massive penis. One guy has a legit 10" cock, and he consults with a surgeon to get penis reduction surgery...
I don't think I would do it, but thought it was an interesting method that is being explored. I will stick with PE combined with test, PDE5 inhibitors and possibly GH secretagogues and stem cells in the future.