Dragons are known as myths only and there is a reason for such a thing to happen. This is because they are scarce and are always hiding somewhere letting their rank increase until they can fearlessly roam the world.
However, when they got stronger, they have already turned into wise beings about being alone for centuries. They would only leave their abode where they will search for a strong partner.
Sometimes they do not. They are so strong that their body is not programmed to procreate. After all, only those beings that are weak have strong lusts. This keeps their species exist even after a long time.
That was not true for dragons. They are the paragon of strength and never depended on one another to survive. They are only stationed in their own place until they die. Only when they are at the edge of their lifespan would they feel the need to have a child.
