When People Crossed arms during conversation, it helps them shut themselves off from other people. We often use this gesture when we are irritated by something. Crossed arms are a clear sign that a person is not feeling good about something.
Men have a unique way of showing dominance. This is nothing but crotch display while sitting. They will plant their feet on ground very firmly and spread them out giving a clear view of their crotch. This is hardwired in males and does not require a conscious effort.
Eye blocking i.e. covering the eyes, delaying opening the eyes, lowering the eyes for a prolonged period are all powerful messages portraying consternation, disbelief or disagreement.
People born blind can perform the same body language expression as people who can see, which suggests that body language is more innate than language or even facial expressions.
If someone makes eye contact with you for 60% of a conversation they’re bored, 80% and they’re attracted to you and 100% of the time then they are threatening you according to study.
Consider how hard it is to change yourself and you'll understand what little chance you have in trying to change others.