hi.. thanks for writing and i have understood your concerns.. actually night fall is a normal phenomenon when u are not sexually active either by masturbation or sexual intercourse.. our body has sexual glands which produce semen regularly, but they have limited capacity for the storage..when u do not masturbate and do not remove the semen by any means then your sexual glands will become full of semen and now whatever extra semen produced daily is coming out at night when your penis becomes hard..or it may come out whenever u have excitement and erection even during the day time,..or during passing urine or stool when your abdominal pressure increases which presses your glands.. so there is nothing to worry, the reason may be the recent cut-down in sex or masturbation.. remove semen by masturbation or sex regularly at least 2 tom 3 times in a week..with regular ejaculation the nocturnal emissions will go away... your sperms will not reduce because of nocturnal emissions..and u wont have problem in having a child.. size of the penis has nothing to do with sexual pleasure and remember masturbation does not cause any sexual and physical weakness. it is not a bad habit...the size matters only in erected state and if it is 2 inches, even then also u may not face any problem while performing sex... when u think that you have any sexual problem, than it causes anxiety and depression, so all the weakness and pain are because of anxiety and completely of psychological origin.. i hope this advice will be helpful to you..best luck.