I'm going to come in on the defence of heteroflexable identity. I identify as pansexual myself, but I have a few friends who define themselves as heteroflexable. As I understand it, they are primary het., but are open to very occasional sexual experiences with people of the same sex, sort of 'it's okay if it's you' type of deal. They don't identify as bi or as pan because they feel like it's a very rare occurrence, and they don't think that they're interested in a queer relationship.
I can certainly see the problematic issues regarding the name, if the attitude is indeed 'no homo', but I think identity is private, ultimiatly.