Schadrach said:
In cases where their sexual orientation doesn't matter, how do you know that they are heterosexual? Other than merely assuming it because they haven't made a point of it otherwise? Or are you claiming it "doesn't matter" if the plot doesn't revolve primarily around their orientation?
That is very true, and a good point. When I was writing that, I was thinking about all the movies where the protagonist has a girlfriend/wife and child all set and locked in so all they need for the happy ending is a dog and a white picket fence. But honestly, I can't think of many movies with a male hero WITHOUT having some sort of love interest at some point, whether they start with it and are trying to keep it safe or gain it somewhere along the way. I'm sure movies like that exist, but most of the time they cover that at some point. The only one I can think of off the top of my head that doesn't do this is Frodo in Lord of the Rings--as far as I know he was never infatuated with anyone and never had a family in the Grey Havens (though I've never read the Appendices so I don't know for sure).
I guess children's stories are the ones that most often leave that ambiguous enough that assumptions can be made either way, because most often those stories are less about gaining and/or protecting families and more about solving one, specific problem (like Remy in Ratatouille, or Lilo in Lilo and Stitch, or basically any character in Winnie the Pooh). That, and they're very often not about adults, and so the character may not be in the seeking a relationship phase of life yet.
So I guess a better way to put it would be whenever a story does bother to elaborate on a character's sexuality, it is pretty much always by default straight, unless they are going to make the character's being gay a specific aspect of their character. You never see gay couples just in the background of a movie, like a couple of men walking down the street hand in hand, or a couple of women cuddled up on a bench watching a sunset. Hell the media is just now beginning to realize that interracial couples exist. Doctor Who has gotten in the habit of doing this, and while sometimes they can be a bit heavy-handed with it, it has produced some genuinely sweet moments (like two old married ladies in one episode called Gridlock, at one point everybody is singing the song The Old Rugged Cross to keep themselves going in what seems like a hopeless situation, and they take each other's hands and it's just so sweet!).
As for that game you mentioned, I think it sounds really neat, and I'll be looking out for it since I have Steam. I'm not exactly sure what you were thinking I would think of it, lol. I'm just hoping there are plenty of moments which transcend all those more obvious overtones and become just genuinely sweet moments, like that episode in Doctor Who.