Does Penis Size Effects Women Sex Satisfaction And How To Increase Penis Size ?

hello doctor ,

iam 23yrs old male, i have a doubt about my penis,that is my penis is only 4 inches (while erect) and i think i cannot satisfy my partner and i read this problem in the internet some members says it is a myth.but i think average indian male penis size is about 5 inches to 6 inches. please help me Dr and how can i increase the size of my penis to 6 inches in a safe method.please guide me Dr....