The London bridge sex position is not an easy position for the man. It requires a very flexible and strong man to perform and a lightweight woman. The man should create a bridge using his body by lying flat on his back. He will then lift his torso and pelvis through the force of his feet and arms. By planting his feet and palms firmly on the bed or floor, he creates a bridge from palm to toe.
Once the man has successfully formed a bridge, his lover straddles him and guides his penis to enter her. The woman uses her tiptoed feet to gain balance, and she should position her hands at her back, planted at the thighs of the man.
The man needs to be incredibly flexible to accomplish this position. And the woman should be very careful in moving, so the London bridge will not fall down.