I heard that the Sumerians were the first who wrote and came up with the idea of dragon. Possibly when Abraham came out because too much graven images.
Shintonism
There was a story about a boy who admires dragon so much, so many posters, firgurines, action figures, drawings, costumes all over his place. He admires the dragon. And one day in heaven , the dragon knowing this, he descended from heaven and meet the boy. When the dragon came to the house. The boy open his blinds, to know what is going on outside, and he saw a huge eye and a dragon and became unconcious.
there was a show on some learning channel about dragons. they said it might be because its a combination of animals we instinctually fear. the snake i think it was birds and something else maybe big cats. either way i dont buy that… dragons exist.
The concept of dragon…
it resembles a prehistoric reptile, the most fearful animal or reptile that man had ever experienced, and represents the evil forces of nature. man’s imagination supplied this concept of evilness, satan, sin, malevolent, etc.