Why on earth does she do this?
The Drop-Jaw smile is also known as the False Surprise Smile. This is a smile that is practiced and occurs when the jaw drops down to reveal a fake, or phony smile. People use this smile to their advantage, because it can display a happy mood to others around them and put them in a happy mood as well.
“...jaw drops down to reveal a fake, or phony smile...”
Thank you - that explains it. I have noticed that constant plastered on open mouthed smile on her for a long time now and it really made me mad because it felt sooo orchestrated and I just wasn’t sure why.
Thanks for this explanation.