Yea, but maybe the causation works both ways. There's a lot we don't know about hormones. They're causes and effects of brain activity, and they probably infl

Yea, but maybe the causation works both ways. There's a lot we don't know about hormones. They're causes and effects of brain activity, and they probably influence muscle and fat on the face. Aggressive men have a certain "look" in the face, and I wouldn't be surprised if this is caused by lots of testosterone. Edit: Or some people smile or laugh or frown or look intensely more than others.