Ah, that makes a certain amount of sense. Although I had pictured the sides of the hammock as rising up also so the sleeper would be like the banana inside a banana peel (which is how it looks from the outside in the pictures I've seen). I couldn't understand how shifting slightly sideways would help. I suppose you are saying that the sides don't constrain you that way.

Hmm. I'll have to find a hammock to try sometime.