Sad brokers can't keep their hands off their faces. Why
When we witness a terrible accident, hear bad news or are in disbelief, putting our hands over our mouths is physically expressing that we cant emotionally take anything else in.
Source: msnbc.com: Health
That's so true and I didn't think about it until now. I think this is specially true for women, we tend to put our hands on our face for all kinds of reasons just because we're emotional creatures .