Brother your penis is for sexual activities and urination. You don't need it to put up a tent on it. Your penis size is good enough for a satisfactory intercourse. You don't have to worry about anything. The average penis size lies between four to six and half inches when erect. Also a size of three inches is enough to have sexual intercourse. So don't worry about your penis size you are just fine. Have a good lifestyle with regular excercises and don't drink and smoke.