Who scratched their parents' feet?

I scratched it! When I was a child, my dad had frostbite on his heel in winter and often asked me to scratch it for him. He and my mother were lying at one end of the bed watching TV, and I was scratching while watching TV at the other end of the bed. I scratched his ankle on purpose. My father is very ticklish, so he shrinks his feet and laughs. I am very happy! My mother laughed at us when she saw us making noise, and I scratched my mother's feet again, but my mother was not afraid at all. I scratched her, but there was no response.