That's not really an obscure or weird thing to research...depending on what you do for a living.
It seemed to me that only more neurodivergent types are the ones that would be inclined to start studying some random thing like this instead of going out to socialize.
Oh so it's to avoid socializing? Makes sense, I've at some point happily learned Arabic, bandweaving, archaeology, electrotechnics, botany to name just a few ...
I don't know if they do it to avoid socializing. I think it's just a weird obsessive thing.
"why are you almost an hour late to practice ?