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Involuntary discharge of semen during sleep; also known as nightfall or wet dreams.
Persons most commonly affected: Adolescents and adult men
Organ or part of body involved: Male reproductive system.
Symptoms and indications: May include restlessness, insomnia, mild night sweats, difficult urination, and mild emotional disturbances.
Causes and risk factors: They are more common in males who masturbate less often.