Talk to Urologist on Penis Size, PE, ED, PD

I am doing masturbation since 12 13 years of age. I have masturbated even 4 times a day in my teen age. Now my penis size is just 4.3 inches and if measure properly by pressing scale on pubic bone according to proper measurement it is 5.2 inches. But I feel it is small to please my partner after marriage. My time is just half or 1 minutes. I have a small curve not pyeronie disease but a small curve. Please suggest me a harmless way to Increase penis size to 6 to 7 inches. And to increase my ejaculation time harmlessly.