So anyway, about angels. We know that as flying creatures, angels compete with birds for airspace and roosting sites. In order to steer clear of the birds, angels use a counter-migration strategy. As birds head south for the winter, angels head north and occupy the niches left by birds. Like birds, angels shit white. Yep, snow is really angel poop. We hold this knowledge in our racial memory. When we make snow angels, we are making effigies of angels out of literal angel poop. It isn't any wonder that angels don't interact with humans unless god orders them to do so.