Books and Bestiality

Spike's tail started wagging as Twilight got herself closer to his rapidly growing erection, she tried to ignore how different it was to what she was used to, different size, shape, color, smell, she only hoped it still tasted nice. With her left hand she gently cradled his soft heavy balls and easily guided his cock into her mouth, her lips gliding along his slippery length until she was all the way down to the base, she mentally thanked Spike for helping her train her throat to accept cock so willingly otherwise she would never have been able to deep-throat without gagging every three seconds. As she began to blow him with her eyes closed and her hand clumsily massaging his pent up sack, she found that not only did his dick taste good, but it actually tasted a little better than usual. Quickly getting a taste for it, Twilight sped up her back and forth motions and got her tongue around as much of his cock as she could, Spike certainly wasn't complaining as he panted wildly, his tongue hanging out and drooling onto the long neglected books below.

Twilight moaned gently as Spike soon reached full hardness under her oral ministrations, it was just then that Twilight had an epiphany. There was a new sexual experience that Spike would only ever get to enjoy while he was in this form, because there was something that all mammals had that reptiles didn't have... a prostate. Twilight wasn't exactly stupid when it came to sex, she had her kinks and she knew that the prostate could provide extreme pleasure to a male if it was properly tended to, keeping up the pace of her blowjob she reached her right hand down to her pussy which had been steadily becoming more and more wet throughout the duration of their extremely intense foreplay. She slid her middle finger inside and pumped it in and out a few times to make sure it was nice and slick for when she was ready to treat Spike to a special kind of pleasure that he might never have the chance to ever feel again. Biology was a bitch sometimes.

When Twilight was satisfied that her finger was suitably lubricated, she moved her hand away from her pussy and brought her middle finger up to just underneaths Spike's tail before gently pressing the tip directly onto Spike's tight virgin asshole. The sensation of something pressing on his rear entrance momentarily distracted Spike from Twilight's ongoing assault on his cock, still seemingly having the energy to not falter for even a second despite having to concentrate on gaining access to his ass so she could stimulate his prostate and also hungrily blowing him at the same time. "T-Twilight... what are you-" Spike's eyes went wide as the tip of her finger slipped into his asshole and slowly began delving deeper and deeper inside his back door, it's not as if he was entirely opposed to the idea, it was just surprising to say the least, though judging by the way his cock throbbed and started leaking more pre-cum while his balls ached and churned to produce a huge load, it seemed he was enjoying it.

However, Twilight could tell by the clenching of his anal walls down on her intruding finger that he was not as relaxed as he could be, he had loosened up once he accepted that the penetration was enjoyable, but it was still a relatively new feeling. In an effort to calm his muscles she stopped bobbing her head and simply allowed his dick to just lay in the warmth and moisture of her welcoming mouth, which worked to a certain degree, though it seemed she wouldn't have to do the moving soon anyway, for when her middle finger was all the way in and she located his prostate, the careful stroking she applied spurred Spike into action and his hips started thrusting on reflex. Due to their position, his attempts to fuck Twilight's face weren't exactly successful, nevertheless he was panting with a dreamy look on his face, his tail was wagging and he felt fucking incredible.

Being a dragon, Spike had never been able to experience much anal play, let alone prostate play, he almost wished he could stay a dog in Equestria if he got to experience this kind of depraved and taboo sexual pleasure. As much as he wanted to enjoy Twilight's rubbing on his prostate as much as possible, there was only so much he could take, with a howl he released rope after rope of his thick heavy load into Twilight's soft velvety mouth. Twilight allowed his spunk to collect and sit in her accommodating mouth, savoring the salty and bitter taste on her tongue as her cheeks ballooned out slightly as Spike deposited the last few shots of his seed inside her. His cum wasn't too dissimilar to how it tasted when he was a dragon, there was a slight hint of a difference there for sure but Twilight couldn't quite place what exactly it was, Spike's cum was an acquired taste which she had grown to love over time, she figured that all cum probably wasn't suitable for those tasting it for the first time, but that it was practically a replacement for all other liquids to the average cum guzzler.

Once Twilight was sure Spike's balls had no more to give, she ceased her stimulation of the prostate and removed her finger from his ass while she slid her lips off of his cock and swallowed down his warm creamy jizz. As she caught her breath and regained the ability to speak she giggled and said "Spike, as much as I love your natural taste, I think it might be worth exploring the benefits of eating pineapple".

Spike returned the laugh and said "Fair enough, nice going on the prostate there, that seriously made me nut so fucking hard"