First watch this.

Ok so I totally agree that I would have picked the person chewing gum to be more likable in all situations, but the non-gum-chewing twin was sitting there like a log. I mean I think if the other person was smiling and not looking lifeless (which the gum chewing eliminates) that we might have different results. Although I still really think this experiment is cool and I will use it to justify any gum chewing problems I run into. Props to my manager friend Lizzy for showing me this video