Romance novels with explicit sex.
Derived from "romance" + "erotica".
In some cases this word has been in a humorous, derrogatory, or ironic way used to point out the fact that certain novels are classified as "romance" and therefor seen as more socially acceptable, while other somewhat similar books are classified as "erotica" and recieve harsher social censure.
So you're looking for regency holiday novels with chaste heroines? It doesn't look like we many in the store. Mostly just romantica I'm afraid.