He could have a Hand fetishism. I think around 1% of people have it so its not that uncommon. Might mean he will have a preference for things like handjobs but honestly you should just ask him.
Without seeing your hands, I have to assume your hands look really nice and he wants to see something he likes. At least he's not looking for pics of feet.
Maby he is Jak from Titanic.
I didn't even know a hand fetish was a thing until I read the comments for this question.
why don't you ask him? how should we know about it ;)
either he has some hand fetish or wants to find a suitable ring for your fingers haha
Anyway just stay calm and ask him in a friendly way without judging him :)
As others said, hand fetish.
He has a hand fetish
Ask him why
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