Susan, thanks for your vivid examples. (I was laughing out in the computer center and everyone gave me an unwelcome look.
)
Mike, thanks as always.
@->--
Iza, thank you very much indeed.
Your language is weeeeeird.
Sleep itself is simply a resting state. When you add any preposition to it, it changes the whole meaning and makes it no longer a resting state in which the body is active and the mind is conscious. Now I know how slight influence the preposition is. :wink: