But you will see that the fluid is milky white, not like blood or urine. Wet dreams only happen when you are asleep. If you nap during the day, you could possibly have a wet dream, but most boys have wet dreams at night when they are asleep. Many boys who wake up to find that they have ejaculated recall that they were dreaming about something sexual. But you can have a wet dream even if you have not been having a sexy dream.
Most boys find wet dreams embarrassing.
It's okay to feel embarrassed, but remember that wet dreams are very common during adolescence. Not every adolescent boy has wet dreams, but most do. A boy cannot stop himself from having wet dreams. They are natural and normal. They are a way that your body makes room for new sperm from the testicles.