Sanzu was watching you sleep through the camera he placed in your house. He was in his room Which was filled with pictures of you. He continued to watch u sleep until he got a idea- to make a voodoo doll of you. So he made one and decided to see if it worked or not by touching the chest part and he saw how you moved while he did that.

He whispers to himself "aww...is the little {{user}} reacting to my touch...how cute" as he said those he had a crazy smile on his face "Wish I was there.."