The implication is that if you are sad there are more associated tells than just your mouth. Imagine a clown doing a mock sad face and exaggerating sadness by f

The implication is that if you are sad there are more associated tells than just your mouth. Imagine a clown doing a mock sad face and exaggerating sadness by frowning. I've always felt this was a forced contrivance and never that anyone literally thought frowning had anything to do with smiling.