It may be a better investment of time and resources to increase the size of your confidence and self love and respect, that isn't based on societal conditioning and belief systems stemming out of peer and social pressure.
If the size of your penis is standing in the way of your happiness and completness of "self" then I suggest that emotional healing work is in order.
There are many options for that ranging from NLP to EFT, etc.
Beleif systems run the ship. Changing the code, changes the voyage and the view ;-)