It's the "including sexually" part I have trouble seeing.
I should be more clear about what I meant. I've heard her talk about his sexuality in an interview, so I just included that are of Dick as part of her interest since she said it was. I don't see her sexualizing the relationship between Bruce and Dick in canon either. She's also said she thinks of him as bisexual but I've never seen her put that into canon, really. (I think she more said he was potentially bisexual, which I've no problem with.) I assume that Fabian Nicieza considers his sexuality to be part of him too. He just hasn't really put him in sexual situations as much (having never written Nightwing, he also hasn't had the opportunity).
Though now I think about it I remember him having Dick make jokes about any woman who breathes being "his type" which I thought was kind of OOC, but I think he was just trying to get a reaction out of Tim at the time anyway.
So tl;dr I just meant that Grayson's dealt with his sex life and outside of comics has give some thoughts on it.