[31 M] asking for my selfie [26 F] after meeting up few times

I [26 F] have met this guy [31 M] for more than two times already, and he recently just asked me over facebook with these words "I can't find a picture of you on fb, can you send me a selfie ?" ... which is bulls*it, because I do have about 3 pictures up (that's more than enough), and he has met me in person. So no reason to make sure that I am not catfishing him. When I replied saying "Wait what for", he replied, "Nervermind i was a little drunk".

tl;dr: Just curious, what this all could mean? What does it mean when a guy asks for your selfie?