When DD was young and we could no longer spell things in front of her as a code, DH and I started spelling more obscure words. One day DH and I were talking about how to handle the stranger safety topic when DD walked in (I think she was about 4). DH spelled predator to me. DD said very seriously "yeah, I don't want to be someone's prey". That's the first time I realized that pretty soon DH and DD would be the ones talking and I would have no clue what they were saying.
That sounds so much like my son at that age.