In bed I sleep on my stomach and side, flopping around a lot, which means I have to braid my beard or take some other precautions. But for naps, I sleep on my couch (when you live alone you can sleep on any available piece of furniture, nobody will stop you image). On the couch I sleep on my back without moving around and I don't have to do anything special for my beard. I don't know why sleeping on the couch is different for me, but maybe it's because the couch gives support against both my back and my side.