Unexpected and involuntary seminal discharge during sleep in males is referred to as Nightfall or Wet Dreams. Many times, when males start to have erotic thoughts about the opposite sex, and imagine a woman to be next to them in the bed, or see nude pictures of a woman, they face an erection. Such unexpected erections with seminal discharge are called Wet Dreams. Most males sleep through it and realize it only in the morning, and very few actually wake up in the middle of their sleep.

Nightf...
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