reflex body actions,smile and yawn

Well sometimes but not all the times. I have a personality where I at times do not show any emotions at all. But I know it is possible, somebody smile with you and you cant help but smile back

It has happened to me a lot of times. Well, about the smiling part, I could smile back at a stranger but that depends on my "gut" feeling that time. Coz there are people who have just seen and yet you feel that the person is fine and you feel safe. Other times, I just turn away. As with the yawing, oh yes! Very contagious indeed!

I am always smiling at strangers. Saying hello, or good morning, or good evening. I enjoy smiling and making the other person smile back. Knowing in that moment, I was able to put a smile on someone's face. A simple smile is a powerful gesture

I would definitely smile back when someone smiles at me. Because it is only considered polite that way and it is the right thing to be done. So in a way smile is contagious but not to everyone because I have seen some people who do not smile at you for some reasons. By the way, I did notice that yawning is quite contagious too because when one person yawns, someone around the person would do the same too. There must be scientific explanation to this.

I think the fact that most people smile back is just manners really. Though it is a really unexplainable but good feeling to smile I must admit. And yes, yawning is VERY contagious, I always yawn when someone else in the room does, never got why that happens lol.