A student in the front row can’t hinge forward. She’s seated, legs extended, trying to reach toward her feet. Her pelvis won’t move. Her spine is rounding from the base. Her face is doing the thing faces do when the body refuses and the person inside has decided this is a personal failure. I tell her: put something under your butt. She looks at me like I offered her a reduced sentence. The prop mythology runs deep. Blocks are for beginners. Props are for people who can’t do it yet. Put the block away when you’re ready. Some of this comes from lineage — traditions where the shapes were sacred, where modification was equivalent to deviation. Some of it is aesthetic. A room of people…