Here's a link to the interview (scroll down a bit):
Grant Morrison talks about his Batman books, Joe the Barbarian, and his desire to tackle The Flash and Wonder Woman: “I think one of the things that was lost on the Wonder Woman strip early on was a kind of slightly strange sexuality that the creator, William Marston, brought to the book. So, I think over the years a lot of people have had trouble dealing with the character–you know, she’s an icon, she’s a representation of women, but at the same time there has been a sexuality there that most people don’t want to go near, which is quite understandable. But because the character was so rooted in it, I think she kind of lost a little bit of her ‘sauce,’ you know? [Laughs] There have been great versions — I’m not saying there haven’t been good Wonder Womans over the years, but I think there’s always that little bit of something that Marston took with him, and it wasn’t the same with Superman and Batman. They didn’t rely on that aspect of the character to be successful in the early days. So, that’s my feeling on Wonder Woman: it’d be nice to restore a little bit of that without being purient or sensationalistic.”
I wonder what he's referring to about Marston's Diana and her sexuality? Personally, I don't get any data about it from reading the Golden Age stories, certainly no more than I get from early Superman and Batman tales. She has a boyfriend in Steve Trevor, and like Clark and Lois, the presumption is that they will consummate their relationship, if they haven't already. In the mind of an adult reading the stories, anyway; children not educated in sexual relationships still possess an understanding of loving relationships.
What is so unorthodox about Diana's sexuality? Is it the bondage play with other amazons? I thought that was a visual expression of the concept of "loving submission", ie, devotion to the peaceful ways of Aphrodite.