I am 24 years old. I don?t smoke. I don?t consume alcohol. I exercise 2 -3 days in the week at the gym for 1 hour daily. I drink tea 1-2 times a day. I have a penis that is 4.3 inches in length while erect. I had the habit of masturbation for the past 6 years. I am not married and I have not had sex with anyone. My first problem is I used to masturbate 7-10 times in a month. But for the past one year I have reduced the masturbation to 5 times a month. Sometimes I lie on my stomach with my erect penis on bed or on the spongy towel spread on the floor and rub myself on the towel and with 2-3 strokes I ejaculate. Sometimes I used to ejaculate 3 times a day. last week while bathing I soaped my penis for 5 seconds and I ejaculated immediately. I am scared that I am suffering from premature ejaculation. My second problem is I have the habit of watching porn regularly/frequently for at least 1-2 hours in 4-5 days in a week. Sometimes I used to masturbate while watching porn. I have a habit of watching Porn in my underwear or naked. For the past one year when I start getting an erection the erection rubs across my underwear?s waistband 2 or 3 times and I ejaculate. I am unable to stop watching porn. I have erotic dreams every night. Some nights when I lie on my stomach I rub my penis and I ejaculate in my sleep unconsciously. I heard that watching porn can cause erectile dysfunction. I am scared because my parents want to get me married between 25-26 years. I am scared that I will not be able to satisfy my future partner and I fear that I will suffer from erectile dysfunction caused due to watching porn. Whenever I talk or think about porn I get an erection. I have the habit of reading online sex stories daily and playing online sex games once in awhile. About 5 months I found that I ejaculate within 20-30 seconds of starting masturbation. So in order to increase my sexual stamina I started practising the start and stop technique of masturbation. I have practised it for the past five days and I have prevented ejaculation while practising i.e. I did not ejaculate at all. I did not cum during the start and stop technique. After the practice I feel a pain in my pelvic region or in my balls. So please suggest a solution to increase my penis size and sexual stamina.