Dragon-blooded
Warning: This article talks about courtship, sexual attraction and reproduction
Causes
Start of a bloodline
In most cases a male Dragon seduces a human or elf female. Cases of relations between female Dragons and males of other species are very rare. Some people even believe that they can never happen.
When a Dragon has chosen a person he begins the relation. In the beginning, the relationship is purely platonic. That early stage is often described as a strong friendship and people feel like they have a sibling bond with the Dragon. It can last months or even years. Later the Dragon starts to secrete pheromones which make the female sexually attracted to him. At that moment the female chooses if she is interested in taking the relationship further. If she is interested in a romantic relationship the Dragon starts courting her. When the female is ready the Dragon takes her to a secluded cave. There the female lies down on the Dragon's back and the pheromones put her into a trance-like state. Then the Dragon connects with the female's body through his scales and transmit his genetic material to her. Pregnancy lasts as long as a normal human or elven pregnancy.
There is one situation in which the process looks a little bit different. It is in a case of a relationship with a Green Dragon. Because Green Dragons are almost the same size as humanoids they don't need such unusual ways. The intercourse and impregnation looks exactly the same as between two humanoids.
Dragon-blooded bloodline
When one of the parents is dragon-blooded all their children are dragon-blooded. Dragon blood can disappear from the bloodline in time, but it is impossible for a person to get rid of it. When both parents are dragon-bloooded the condition is solidified and will last longer. In most cases a bloodline can last for about a thousand years.
Symptoms
Being dragon-blooded manifests itself through increased strength and intelligence as well as an increased lifespan. Some of the dragon-blooded have their bodies partially or completely covered in scales. Dragon-blooded born of a Green Dragon have magical abilities and are naturally very good in nature magic.
Cultural Reception
Dragon-blooded are rare. Mostly because of the Dragons seclusion from the rest of the sapient species. It is said that they were much more common during the Age of Susanne. Despite their rareness, the dragon-blooded aren't feared or hated. They are just another type of people.
It's a nice condition, one of those that may sprout unexpectedly to make a difference in, I don't know social relations, politics? How people respond to Dragon-blooded? Is it really so casual? :D