Mr. Frown-y Face

For as long as I can remember people have been asking me what is wrong or to stop frowning when I am not actually upset. Usually this happens when I am thinking hard about something pleasant or difficult. It either could be that I frown unconsciously when I am concentrating or else when I am absent from myself that my face just looks angry or something. It would be terribly useful to have a picture of myself without being aware of having a picture taken. After all if it is something like the shape of my eyebrows I could do something about that. Not that this question comes up terribly often though the latest time was today while working. It is mildly distressing to think I am sending messages without intending to.