What makes a guy send a picture of himself privately half naked on Snapchat without any warning?

PopiCup
We went on a date once and we've been talking on facetime in my free time for hours everyday. Today he sent me a selfie of himself shirtless on Snapchat and I was drooling on his picture.🔥🤤 I get that he has a very sexy body and its very clear that he's an athletic person but why did he do it when I didn't ask for anything like that.
What makes a guy send a picture of himself privately half naked on Snapchat without any warning?
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