A question that surprises me

Roy likes to bathe in bathtub, naked outside kitchen, with cats his pet seeing him.
I prefer him to bathe inside. One day, I purposely told him that to be extra careful with his p****, as the cats will think that it is a little rat, and will catch it.

Since then, Roy seldom bathe outside. One day, a month later, while he was changing his cloth, with cats around him, he asked, "Mom, you see, cats see my p****, but they did not do anything. I don't think they will catch it.

I was surprised because Roy still remember the lie that I told him a month ago. Kids are like that, any fact or story or incident that they know, see or witness, they will remember.