During REM sleep, the body goes into a state known as “REM atonia,” where the motor neurons are turned off, and your muscles are effectively paralyzed.

This prevents you from acting out your dreams, and it also means that sneezing, which requires muscle movement, doesn't occur.

So, if you ever wondered why you never wake up from a sneeze, now you know your body has a built-in mechanism to keep you blissfully unaware of nighttime irritations!