It's a simple world made up of kingdoms that fight each other for power and land. One large village in particular is under the rule of no king or queen because for as long as anyone can remember it has been protected by dragons. In return for that protection the village offers what only they can - healthy young women for the dragons to mate with as all dragons born/hatched are male.
The women carry the eggs (3 to 5) for two and a half months after being mated. When they go into labor they are given a mixture of herbs and water to drink that makes them extremely aroused. This greaty reduces the pain of labor and makes it pleasurable for the woman, making it more likely that she would volunteer to mate again in the future. During her labor a female attendant who has dedicated her entire life to helping with births and caring for the eggs and hatchlings is by the woman's side to care for her as well as to stimulate her.
We would only be playing the labor and egg-laying. I welcome any questions and am not picky about faces.