I'm a well read grad student who's bluntly honest about all things, although I try to be most honest about myself.
Type in dinosaur in the kindle book section of amazon. Go lowest to highest. You get Goodnight Christmas Tree. And C is For Christmas. Neither of which have anything to do with dinosaurs.
Dinosaur erotica automatically brings you: Touched by a Demon, and something about knitting and sex. What? Also, apparently Clan of the Cave Bear has some dinosaur loving in it, too. If only someone had told me, I'd have been all over that book!
Clearly, there is something wonky going on. The babysitter/kids book is still coming up under free erotica. But I see some of this stuff, and laugh at how ridiculous it is.