When certain characters in movies/books/tv shows have really good chemistry, it's just nice to imagine them together- regardless of the gender of either one.
@man I don't understand it, either. But they make up all sorts of people into couples who aren't supposed to be. It just seems much more out of place when they make obviously heterosexual characters into homosexual couples for no reason.
One would think that a true fan would not corrupt the movie, book, or whatever. But, I guess random fandom couples are only a very minor nuisance compared to some of the stuff that keeps popping up on this site.
Steve's face though XD