As Cassian thought about the massage techniques he'd learned from books and the method he was trying to develop on his own, he recalled the detailed knowledge he had acquired about the human body. To perfect his craft, he had to understand every muscle in the upper body—shoulders, chest, and back—whether it belonged to a man or a woman. Of course, he had no personal interest in studying male anatomy, but his experiences dissecting clones had provided valuable insights. These clones were near-perfect replicas of humans, complete with every vein, muscle fiber, bone, and organ, functioning just like real human bodies, though their tissues were slightly tougher.