In a kneeling rear-entry position, the source of momentum fundamentally alters the angle and depth of penetration. When the male partner drives the motion, his forward thrusting typically dictates a steady rhythm. This force pushes the penis deeply into the vaginal canal, often creating direct pressure against the cervix and the anterior vaginal wall. The female partner acts as a stationary anchor, bracing with her arms and knees to absorb the physical impact. Conversely, when the female partner initiates the movement by pushing her hips backward onto the shaft, she directly controls the exact depth and friction. This backward motion allows her to adjust her pelvic angle, targeting specific internal tissue or slowing the pace to prevent painful cervical collisions. This shift in movement control changes the sensation from a deep passive fullness to active targeted internal friction.
