"Now, this is the something-dorsi muscle," She told him as her hoof pressed down against his back, a few inches away from the joint. Neil immediately tensed at the sudden, weird sensation that spontaneously erupted from her touch. "It's the muscle that keeps your wings held against your sides. You need to relax it so your wings can move." And as she said that, her hoof started to move in a circular motion, coaxing out a different, almost... pleasurable sensation.