This pose is called dual purpose in a way as he can go inside her front and rear both whatever she wants. But it does take a lot of practice to get it right.
Steps to perform:
Step 1: She lies on the bed on her stomach folding one leg at an almost right angle.
Step 2: He puts his one leg around her leg and other on the ground.
Step 3: Now he grabs her folded leg and lifts it a little up to get into the position.
Step 4: It’s time to slide in and out now.