[Shaun]

I think people could be surprised by what they find themselves stimulated by; the ideas of preference and "types" are never really set in stone and you can find yourself changing those like knickers. But I wouldn't go so far as to say everyone is "potentially bi if they give it a try", no, since sexuality is largely driven by what the Id wants and instinctively drives towards.

Not to mention the hypothesis would entirely overlook asexual people, too.