"Wet
Dream" — Something that can be embarrassing and confusing to teen guys,
but is completely normal. A wet dream is also known as a nocturnal emission.
Nocturnal means "at night" and emission means "discharge."
This makes sense because a wet dream is when semen (the fluid containing sperm)
is discharged from the penis during ejaculation while a guy's asleep. Usually
wet dreams occur during dreams that have sexual images. Sometimes guys wake up
from a wet dream, but sometimes they sleep through it.
Wet
dreams begin during puberty when the body starts making more testosterone, the
major male hormone. Although some guys may feel embarrassed or even guilty
about having wet dreams, they can't be controlled and you can't stop them from
happening — most guys experience them at some point during puberty and even
sometimes as adults.