Yeah - i can be totally relaxed but not sleeping for a long time on my back, but to fall asleep i usually have to turn over on my side and curl inward or at least partially face down. I've thought about that - probly protecting the privates area - making it less accessible.
There’s a special providence in the fall of a sparrow. If it be now, ’tis not to come. If it be not to come, it will be now. If it be not now, yet it will come—the readiness is all. - Hamlet, Act 5, sc 2