Wet dreams, also known as nocturnal emissions, are a normal part of puberty in boys. During puberty, the body starts producing the hormone testosterone, which can release sperm. Wet dreams usually start between the ages of 13 and 17, with the average age being around 14. However, there is no exact age when wet dreams start, and some boys may experience them earlier or later than others. It is also normal if a boy does not have wet dreams at all. Wet dreams occur when a boy ejaculates while he is sleeping, usually during a dream that has sexual content. They are called wet dreams because semen, the fluid containing sperm, is released during ejaculation, and the boy may wake up with a wet spot in his underwear or pajama pants. Wet dreams are not caused by masturbation during sleep and occur without any manual stimulation. It is important to note that wet dreams are a normal part of growing up, and there is nothing wrong with a boy if he experiences them.