I don't know.. there is a saying in German that "you earn your face" - and it's obvious that hormonal balance, face muscle tone and predominant facial expressio

I don't know.. there is a saying in German that "you earn your face" - and it's obvious that hormonal balance, face muscle tone and predominant facial expressions influence our face's appearance in the long term. 60% accuracy does not sound SO obvious to me, I bet it's easier to distinguish between religious extremists (ascetics) and non-extremists.