Board Thread:False Info and Speculative Discussion/@comment-24601009-20140923144801/@comment-13965604-20140923152501

There were definite sexual tension type of scenes in s1 and s2. The reason you don't see it past that is because they stopped writing them scenes together, and the actors pulled back their chemistry.

But regardless, there is no real explaining ships. I mean, Harry/Draco was bigger than either Harry/Hermione or Harry/Ginny. Heck Harry/Snape had a fairly large following. People see characters, see their chemistry, and something clicks.