(This is a story in the middle of Mating of the Sentry.)

Spike gets a letter from Dragon Lord Ember of great importance now that he is 18. After arriving in the Dragon Lands, he noticed an odd sent coming from the female dragons while the males looked nervous. It wasn't long before he found out that it's mating season for dragons when he became erect by the scent.

Now he and all the male dragons have to survive the month while they're being hunted by the females. He lasted a good few hours until a certain orange dragon caught him and has her way with him.

You'll have to read the story to see how it goes.