This thread reminds me of a childhood experience. If you don’t mind my rambling bit, it may shed a light on a sub’s (at least one’s) idiosyncrasies.
I was in elementary school and visiting my friend. Her mother gave her two lollipops to share. One was green apple and the other cherry flavored. Her mother told my friend that - because I was the guest - I should choose. So my friend offered me the choice. My thought process went something like this:
Oh! Green Apple! My very favorite, the most awesome flavor ever! Certainly my very sweet friend would want that one. I choose the red cherry one. We eat our lollies. After we are done, my friend whispers to me: “Was the cherry one really good?”… and it comes out that cherry was her favorite flavor.
My point with this bit is that sometimes when we guess at what another person wants, we are wrong. Now, please don’t go accusing me of learning this lesson for myself, as that child. That would be giving me far too much credit. I am a work in progress you could say. I still catch myself doing exactly this: attempting to guess (I am often right, swear) at another’s preference… but I digress.
As stated by openyoureyes, the red flag is his lie. Perhaps this is a growing opportunity/path laid out before you. Perhaps - if you saw fit - you could start your lesson plans and mold him in the way you see fit.