your matress might be too soft, which is harmful to backbone. of course you can find 'firm' or 'very firm' one in stores. don't hesitate to ask salesperson.
-guest:;
2000-10-2(#9825@0)
Hehe, I sometimes just sleep on the floor carpet. Kind of comfort. ^_^ and save money for the matress.
-guest:;
2000-10-2(#9827@0)