Does it ever happen to you? You'll just be having a calm and thoughtful moment and people react as if you're traumatized from some horrible experience and ask you "what's wrong? what's the matter? what's happened?" and you give a puzzled look and say "nothing, i'm fine" and they say "yes it is, what's wrong? You're not being your usual cheerful self" and they persist and insist that something is wrong with you and that you must tell them what it is before you go home and do something drastic. I mean, just because someone is not smiling and laughing does not mean they are upset about something. So why invent a problem about it? If I'm crying you can ask me what's wrong. If I look to be physically in pain then you can ask me what's wrong, or if I have snapped at someone angrily, then you ask me what's bothering me and what is causing me to act in that way. But if I'm just being calm and thoughtful and not bothering anyone, then don't bother me. Quite reasonable, don't you think?