I gotta tell you, the body is one amazing work of art. So much movement and expression capable of many shapes infused with emotion and character, any pose is imaginable. We use our bodies in so many unique and different ways but for some reason when it comes to photography, we tend to tense up and limit our imaginations into a self conscience state.
Part of the process of achieving great poses definitely comes from the subject your shooting with but in the end, the results fall into the photographer's hands. They're the ones behind the camera and come out with the final piece of work. So it's definitely in your favor to know how the body works and all the capabilities for expression. It's a never ending process to express and direct your vision clearly but in the long run the effort is well worth it if you study and apply the principles.
“Knowing body, heart and mind opens the world to infinity.”
I can talk my head off about precise angles and what not but you'll never get to the point of flow if you don't know your own body. Photography is mainly a visual art and appeals to our minds but what gets us into the heart and emotion is the movement within the frame. You don't have to be a top model but exploring your own body and how it moves in relation to the camera will give you a sharper edge and understanding when it comes time to communicate on set. If can be quite discomforting to take a self portrait for some but if you manage to make yourself look in certain ways, you'll now gain an internal understand of posing beyond the verbal level.
When prepping for upcoming shoots I always use myself as the subject if nobody is around to pose. If your shooting quite frequently then the amount of experience starts to add up in your favor. Sooner of later you'll be an experienced posing coach if you ever would want to monetize on the new skills acquired. In essence the whole reason in practicing the lighting setup on your self is to be able to show the model what your looking for.
A lot of beginning models or even everyday people don't have a clue on how to display themselves on camera. Showing them how you would go about it breaks the ice in communication. Plus it also shows your unafraid to look over the top and goofy which in turn sets a welcoming environment of ease. Ever try to look your best stiff as a board? Don't think that's ever happened. The first step to any pose is releasing tension in the body. Then you can start tweaking on the details to bring out the character to shine!
“Striving to know infinity is forever not knowing.”