In true Rule34 fashion (Rule 34: If it exists, there is porn of it. No exceptions.), there's now "published" dinosaur erotica. I put published in quotes because I'm pretty sure dinosaur erotica has been floating around the fanfiction universe for...ever. This is just the first instance of dinosaur erotica you can actually spend money on in the Kindle store.
If you'd like an accompanying dildo for your dinosaur erotica reading experience, I suggest Bad Dragon.