The forty-two is a sexual position that is related to the sixty-nine. In this position the woman will be on all fours and the man will be behind her on two, hence the name forty-two. The woman will be on her hands and knees and the man will be crouching down but still standing. This position requires much stamina and muscular fortitude from the man.
We started out with the sixty-nine and ended with the forty-two.