Hi and welcome. I have a question, if you are the happiest person people know, and I assume therefore have positive facial expressions in general, how is it your face affecting your mood?
I have to say I found your ideas difficult to stomach. I am by nature a positive, optimistic person and don’t go around with an angry/worried/sad face (even when I’m struggling - you’d never know I’m ill from my expressions most of the time). I find it difficult to believe that my 3 decades of illness is caused by me having a sad face all that time. Mental health is far more complicated than that and our brains are immensely intricate - we know so little about them - so your theory is over simplistic and doesn’t pay any respect by the wonderful complexity of the human body and mind