This is inspired by popular saying "it's so cold outside" in other words " it ain't safe out there". We lose our loved ones to different situations some of which could be heartbreaking and sad. Don't go through that door cos it wouldn't be safe out there is a lyrics trying to prevent the ladies from making rash movements. In the society at large, many things happens, to girls especially. So it should be safe if they stick to someone loyal instead going to the wrong hands.