First of all, a all -clear or, depending on, disappointment: nobody has sex with dragons in these books. The dragons already together, but that is not described in detail. The sex between people is described in detail. But it is not always detached from the sex of the dragons. There are telepathic connections between dragons and their riders, and the dragon lust can be transferred to these riders. Confused? Interested? Welcome to the world of Rebecca Yarros' book series “flamed”.