I find this interesting, because I have always found body language to be interesting.
I have always had a problem with people who are being deliberately deceptive, and part of that is probably that I reflect back my own values...which is a problem.
I have always tried to be straightforward in all my dealings with people, business and personal, and...I have on more than a few occasions ended up on the rocks due to that mistake. I have gotten better as I grow older, which is probably expected.
Sigh. I can *still* be very naïve to the point my wife rolls her eyes at me. But I try not to put my foot as squarely in it as I have on occasion in the past.
I have a friend who was a Homicide detective in a mid size city for almost 20 years. Besides the nightmares he still has, one of the biggest curses of the job he says, is that you become a human lie detector due to all of the interviews you conduct. He says almost everyone lies to some degree, even if only tiny white exaggerations, and he says it makes one very distrusting of almost everyone. He also says you learn quickly that a large portion of the population has hidden lives which even those closest to them have no idea of.