Hypnosis

John put on the hat, and dropped Kylie into trance.

"First, call Kendall and Kim and get them over here."

Kylie obeyed. She called her two sisters, then remained in trance.

John was going to have fun. "Who will get here first?"

"Kim."

"Okay, when she walks in, you will act like a playful little puppy, and not stop until I command you."

"Yes, Master."