A word from the wise; if you're in a relationship and you decide to embark on this particular flavour of personal improvement, best keep it to yourself. My relatively long term relationship ended recently and it wasn't because my cock was too small, it was (in part) because I didn't keep this mildly neurotic bullshit on the down-low where it belonged.
What was I thinking being open and honest about my insecurities to someone I loved? You live and learn.
As you were.