This is a genre in Literary Fiction. In the tradition of writers of the past such as James Joyce, Henry Miller, Anais Nin and Pauline Reage. D. H. Lawrence wrote a book called Lady Chatterley's Lover. While it is a book about many things, it does have erotic parts -- as do the other books above. Erotica differs from Romance books in that there might not be a happy ending to the story. Contemporary writers such as myself want the reader to "think." So goes most Literary Fiction. We are just a subset of that genre.
Heteronormative. This pertains to heterosexuality as in -- males who like females and females who like males. It relates to sexuality in the same way as above. It relates to the genre of fiction I write as Valentine Bonnaire. I follow a line of writers in this genre -- Literary Erotica -- which is not smut and not pornography. xxoo! <3
In looking at the word map, none of these words really relate to Literary Erotica, per se. Some of them might be offshoots? Heterotica is of the sort one might find in D. H. Lawrence -- "Lady Chatterley's Lover." Sexuality between a man and a woman as shown in the novel.