I use my fingers to begin ruthlessly tickling Kitty's bare soles and ticklish toes. She yells out in laughter, which is what I want to hear! She can't move, she can only wiggle her feet. I'm merciless as my fingernails aggressively rake over poor Kitty's sensitive soles. But she's not suffering enough for me! I'm feeling sadistic. I rub baby oil onto the bottoms of her feet, which makes them even MORE sensitive.