answer:i was just reading around, some guy asked how do you know you aren’t sneezing when asleep? lol I also ready that a lot of our mucus membranes are .. in laymans terms, “shut off”, so are a fair amount of your muscles, meaning that even if something did bother you, your arm would move because it takes far less energy than your lungs would take to blow it out, so that could be a fair reason possibly? dunno…. good question though. I mean I know dogs can bark in their dreams sometimes, and I’ve seen one of my sisters burp while asleep (that was nothing short of hilarious), and we cough. Dunno really..