Yes, this is real and apparently quite popular. A sub-genre of the fast-growing “monster erotica” book realm, softcore dinosaur porn is epitomized by authors Alara Branwen and Christie Sims, who claim to earn six figures churning out e-books for their obsessed fans. Jezebel offers a taste:
Azog stood, clad only in damp buckskins, waiting for the beast to slash at her torso until she lay helpless and bleeding on the damp cave floor. Instead, it reached out with a classed hand to snatch at her damp animal hide as it clung to one shoulder. Azog felt the kiss of sharp claws against her skin as the hide slid from her shoulder and exposed on naked, heaving breast.
A reptilian tongue, stiff and hot, dashed out to lick at the tender, naked flesh so suddenly exposed. Azog gasped at the touch, then gradually relaxed as her body warmed to the intoxicating sensation of the beast’s flesh against her own.