By fan request, the sequel to Hoarding Rubies.

After getting the stallion of his dreams, Spike somehow finds himself longing for more. Though he tries to stifle his urges the only way he can think to, things take a wrong turn when his lust overrides his sense. Desiring more stallions for his hoard, he travels to Sugar Cube Corner in order to find "Mr. Pastry."

Though the first story will contextualize the porn a touch, porn is porn, so you should be able to enjoy this well enough without it if you're simply a fan of ponies having sex with dragons.