There are many variations on the basic right angle sex position. This image shows you the position from the perspective of our model B (who is being penetrated). It highlights one of the benefits of this position which is the visual for B, who can see all of A's upper body and movement.
This image also highlights the way that A can grab, hug, and move B's leg or legs, which in turn changes how much physical closeness the two have, the angle of penetration, the depth of penetration, and the kind of movement. For example, A could gently move B's hips from side to side, creating a very different feeling during penetration.
