I am male of age 31 years. I can't hold my erection for more than 1 min. My penis get soft and even my size is only 2.5 inch at it's best. Is there any way to get it longer and stronger. Hold it erection for more than 15 to 20 mins. So I can enjoy my sex life. I have only had sex 25 or 30 times till date that too very bad experience due my penis size and get soft to quickly. Doctor I need serious help.