SamuelRSmith on 25 June 2007
Most probably because when DVDs first came out they needed a different design to stand out from the CDs.
They are roughly the same height of a video, and people may automatically recognise it as a movie. Not fact, just an idea.
And the sleeping thing, I don't get it myself. If I were to lay the opposite end on a regular basis, it wouldn't work, but if I were to change back to the 'normal' direction I would fall back to sleep again. You should try it if you have trouble sleeping (also, if you lay on your stomach sleep try sleeping on your back and visa versa).
