Why he wants to see my face on nudes?

So I have a friends with benefits since 4 months now, we can't see each other that much but we do a lot of sexting.. last night he asked in between sexting and nudes for a selfie because 'he wants to see my pretty face again', why would he want that? Does he wants to be sure that i'm not hiding it because i'm uglier without makeup or something? :p or does he wants to prove someone that it's me that is sending pictures? I don't know why I think about it, maybe he just want to see my face but I don't really understand it.. he already sees the rest of my body, so.. and I also want to know why he can't just look up some nudes on the internet when i'm not really in the mood or when it isn't the right moment for me to send them? :p he always keeps asking for them..
Why he wants to see my face on nudes?
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