And so it begins to degenerate, once again, into the insipient premise that "it's all about sex". Trying to simplify and generalise that which is fundamentally complex and subjective. Equating emotional responses to mental reasoning.
Would homosexuals take the hypothetical "straight pill"?
Personally, no. A few years ago, that answer would have been different.
In general, people would likely (in my humble opinion) divide into three main groups; those forcing/being forced into mandatory medication, those avidly against the pill for anyone under any circumstance, and those who would consider it a personal choice.
How would people perhaps choose for/against such a thing? Emotions and desires, emanating from peer pressures within their respective society. The need for acceptance, or wanting to be "different" from the majority, or having a "normal" family, or experiencing "acceptable" urges, etcetera ad infinitum.
Ever watch the X-men trilogy of films? A group of humans, different from the average person, all around the world in all societies. Some are obviously different, some aren't. Some realise they are "mutants", some don't, some pretend not to be. There are more of the mutants around than people realise. Some societies abhor or fear them, others see them as gods or attractions.
The world at large starts to realise the mutants are out there, and faces the challenge of deciding what to do with them; destroy them? Cast them out? Embrace them into society? Outlaw/restrict/monitor them?
Some mutants just want to live their lives in peace. Others want dominance. Others react against their society, returning fear and hate, with fear and hate. A small group seek equality and mutual understanding.
A "cure" is found for the mutation (in actuality, a suppressant). Some want to take it, others hate the very idea of it, some want to force it on people etc.
Deja vu, anyone?
What feelings would compel you to steer clear of hetero sex?
What feelings make most of my friends turn and stare at the buxom barmaid, whilst I'm sitting there oblivious as to what all the fuss is about? What makes you fancy someone? And it's not just sex, it's romantic relationships.
Sex is sex, a biological activity with a lot of emotion tangled up in it, and varying levels of drive to partake in it. The physical aspect cannot be totally separated from the psychological. Stimulate the right organs and most people derive physical pleasure, be it from their own hand, another man, another woman, a piece of machinery, whatever. But different circumstances elicit different emotional responses in different people.
Some gain emotional pleasure from heterosexual encounters, others displeasure. Some don't like the idea of any sex at all. The idea of sex with a female makes me cringe, be it in a random encounter or within the context of a relationship. Much as, I suspect, the idea of sex with a guy makes Inviolable shudder.
A man receiving oral sex from a woman might feel differently about the whole thing were he to discover the woman was a man. What changes? It's all in his head.