Dear service user, Thank you for contacting Healthcare magic. Night emissions or ‘wet dreams’ are normal physiological events. They occurs during sleep, so if you sleep it may occur. It has nothing to do with day or night. Semen is being manufactured by genital organs continuously; it has to be expelled by some means. This situation is just akin to a glass of full water to which you add more water, with the logical result that it overflows! This happens to semen too. If one neither has sex nor masturbation for long time, semen gets expelled in the form of wet dreams, which is normal. You are worried because of lack of required knowledge. I suggest psychological counseling. I hope this will help you. Feel free to ask anything again if you have any queries.