I don't know there is a dividing line here. If you just start crying and your with a friend eating dinner or talking about something good it may look strange. But if your talking about a pain you feel emotionally or otherwise than most normal people will understand your crying. I Cry when I see heart touching movies, hear a certain kind of song and remember certain experiences. Maybe I cry more than some but I have never seen this as a negative but a positive. It means I have more heart and can see pain where many are apathetic.