Hi, I can understand your concern about penis size, night emission and discharge during sexual excitement. This kind of curiosities is common at your age and I will address them with my best efforts. The size of penis has no relationship with sexual satisfaction of the either partner by peno vaginal contact. Only outer vagina is sensitive. Inner 2/3 is largely insensitive. So penis size more than two inch is enough. There are small glands in the way of urine tube (prostate and bulbourethral glands) which produce the fluid during sexual arousal. Just alike food causes salivation in mouth. This is also a normal response of your body, not a disease. Do not worry. Night falls are normal response of body when semen accumulates in the pouch and not utilized in sexual intercourse or masturbation. It will stop when you regularly remain active sexually. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Chintan Raval