There’s a difference between romance and erotica. Besides the obvious attention to certain areas of detail in one versus the other (and that line does get fuzzy – I’ve read and written plenty of romance that was straight-up ladyporn), I think one major difference is the use of intimacy to build the relationship. Erotica tends to get right to the point, while a good romance (in any genre of book) has to have a foundation.
It’s a rookie move to write a whole bunch of hot sex, slap a plot around it and suddenly have your characters end up in love. Romance doesn’t really work like that. You need to build that bridge before you happily traipse across it, and this is done by showing moments of intimacy.
For example: Game of Thrones.






