Greentext

your sexual orientation is not compatible, then it’s fine rejecting them but not disliking or being repulsed by them.”

I mean, I'm referring to sexual repulsion. This is typically what people are referring to when they talk about having a preference against some person or other. It manifests as a visceral negative reaction, very similar to what one might feel if they think about eating something they find gross. A gay man would find the idea of sleeping with a woman repulsive. He can still treat women with respect. In the same way, a woman can find the idea of sleeping with a bi guy repulsive, and can still treat bi men with respect. This is an incompatibility in sexual orientation.

Same guy, same level of physical attractiveness, just as good a person, but straight : desirable. Exact same person but bisexual man : repulsive and less than a real man

I could just as easily swap in what kind of shoes the guy wears, the guy's political affiliation, the accent the guy has, the way he has chosen to style his hair, or literally anything else.

But I am curious, do some groups of people give you a “visceral feeling of disgust” like mint chocolate gives you ? What groups of people would those be ?

Certainly. I'm straight. The idea of sleeping with another man gives me a visceral feeling of disgust. This is fine. I am completely comfortable admitting this, because this is my sexual preference.

Or are you saying it’s ok or normal being viscerally repulsed by poor or shy people?

It is 100% okay to feel whatever feelings one feels. If the thought of sleeping with someone who is poor or shy is repulsive to you, then that is fine. You don't have to sleep with them.

and frankly I don’t even know why you brought up physics in a story about social issues

Because I don't think you know what the word "objective" means.

The Aztecs thought it was right to sacrifice children to the gods by cutting their hearts out. We don't. Moral relativism says that both of these points of view are equally valid in their respective cultures. I happen to think that this is more or less the correct point of view, since any kind of objective morality is literally impossible because all morality is is values, and values are pure subjectivity. But that's an academic distinction.

My point fits squarely within good ol' fashioned liberal western ethics, which you identified as "does no harm to anyone".

Being sexually repulsed by bisexual men, and expressing this preference by simply not sleeping with them harms no one.