It actually makes his relationship with Grindelwald a lot deeper, and there's nothing to contradict it in the book either.
Please. As if adding a sexual component to a friendship suddenly makes it "a lot deeper." More complicated and tense, maybe, but it's pretty clear that Rowling said that as a way of generating more discussion after the final book's release.
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http://www.youtube.com/watch?v=SBpfwpOPXNc&NR=1&feature=fvwp
I watch Planet Chasers Starlight Excellent all day, every day.