Crossing your arms

Crossing our arms is something we do very often, sometimes not implying anything and we tend to do it due to our subconscious.  What message does crossing a person's arms have for you?

Would you categorize it as a negative or positive message?  Do you see it as a kind of shyness?  Do you see it as being in control? (Think about yourself and when you tend to cross your arms).

We need to think before we cross our arms, because other people might read a message that we did not initially intend on sending out to them.