hide it under..

Can you predict whether a person is down or happy by the way they write in msn?? must be very "cool". i cant understand how they do it by just knowing... weird..=P can a person just predict by the hehes and hahas you reply them? for example.. if there's less hehes and hahas or whatever =) =D =P emotions that means you're down. what if that person is used to not putting those?? maybe they can tell. i cant see it for myself but others might. hehehehe...