The writer - who has previously worked on Doctor Who and Torchwood - told Blastr that the new series would be an "adult" retelling of the Arthurian legend.
"[Sex is] part of our palettes, and also we have some beautiful actors as well," he explained. "This is an adult drama."
He added: "The extraordinary thing in all the versions of Camelot and Arthurian legend is it's all about the romance. It's all about the passion. It's all about great ideals compromised by falling in love with the wrong person. So it's an element of our storytelling."
Series star Joseph Fiennes, who plays Merlin, agreed that the show is "romantic".
"It's a beautiful, riveting, romantic, sensational epic story that has never been told in all of its episodes," said the actor.
Camelot is expected to premiere on Starz early next year.