Apparently he takes after me when it comes to retaining useless information:
#2: "[#1]? How do tongues taste stuff?"
#1: (huffs a big sigh) "Tongues have thousands of bumps on them called taste buds. Different parts of the tongue taste different things. The taste buds send messages to the brain and the brain tells us what the flavour is."
#2: "Oh." (long pause) "How do our ears hear things?"
#1: (facepalms) "When will you learn how to read?"