Is it normal to ejaculate without warning?

You are not wanking enough, start a regime where you wank before you go to bed this will prevent this from occurring!

Onanism is the cure.

It's called nocturnal emissions. It starts happening when you hit puberty and can happen afterwards whenever you haven't ejaculated in a few days. It's the bodies' way of getting rid of old sperm and making sure everything works when not in use

Oh yeah you're severely underestimating how arousing sleeping in bed can be

You sure you didnt just pee?

Is your name Bucky Larson?