Hi Pastabrother
i think we have to start understanding the figure drawing as a tridimensional object, composed by squares, triangles, piramids, circles and cubes.
This way you can understand the points of perspective aplied to some positions of the human figure.
to start may help "Tridimensional drawing" by Andrew Loomis and the sinix videos about the figure drawing.
https://www.youtube.com/user/sinixdesign/videos
Dont stop practicing!!