my chiropractor told me its bad for ur neck to sleep on ur tummy. well he didnt say it exactly but we were having this conversation, apart from the spooning part, and he showed me up against the wall what not to do and it was like lying on ur tummy with ur neck turned to the side and up a bit, i think u just have to be careful. i cant sleep like that anyway, my neck hurts. i sleep on my side, if i sleep on my back i usually wake up with a stomach ache, weird