Hi I had gone through your query. 1st you have to accept the fact that your penis size is not increase by any mean. No treatment help. It is natural and god gifted so not to think about it. masturbation is normal physiological function of our body it is one the method to satisfy sexual pleasure in absent of partner both sex and masturbation has same and has same end result to get satisfaction so no need to worry. Premature ejaculation can be treated with both psychologically and drug therapy Psychological means to learn how to stay long certain methods like women on top position condoms lubricated with benzocaine kegel s exercise will help ful .please read on net and learn how to do it Stop and start method of sex is very good results. it is thought diversion method and require time to learn . masturbating before sex can increase your time Proper play and understanding is needed. I hope i have answered your query. feel free to ask. Thank you.