The jackhammer sexual position is also known as the downward drilling, and it is a twist position from the stand and blow oral sex position. The man stands straight with his legs apart, the same distance as his shoulders. He can put his hands on his back or at his sides. The woman kneels with her back to him, and it is best to put a pillow on her knees to avoid pain.
She then leans backward, putting one palm planted on the floor near his foot. The other hand holds his penis, or she can both put her palms on the floor. The woman’s head is close to the man’s groin area, and she reaches closer in order to play with his testicles and suck his penis.
This position requires a flexible woman and a man with a flexible penis. Flexibility is needed for the jackhammer position to prevent injuries.