Emissions occurs when whitish fluid called semen is released through the penis while a boy or a man is sleeping. Nocturnal emissions are most common during teenage and early adult year

It is associated with the fact that, males typically get an erection often during sleep and the semen released owing to the direct result of the stimulation caused by either erotic dreams, or memories of waking sexual activities but many men claim to have had nocturnal emissions without accompanying erotic dreams and another common theory is that wet dreams are the way the body disposes of "built-up" semen,

How common is nocturnal emission?

The frequency of nocturnal emissions is highly variable. Some men have experienced large numbers of nocturnal emissions as teenagers, while some men have never experienced one in their lives

Usual rate of nocturnal emissions are once during a period of 15-30 days are considered physiological (normal) while that occurring twice a week or more and associated with symptoms such as dizziness, weakness and insomnia etc., are considered pathologic (abnormal)