How so? This is all ultimately about perception and about perceptions of sexuality. No one honestly gives a SHIT about chromosomes when you like someone, this really boils down to a fear of being considered gay. A person that reacts badly to finding out they're dating someone who is half black seems exactly on point with what we're actually discussing. I'm not saying that some people would not break up with a trans person for other reason, the desire to have children for example. I'm talking more about the visceral reaction like:
Not necessarily.
The mind is essentially (hurr hurr) an essentialist one. We perceive objects, animals, individuals and groups as possessing an "essence" that defines them. An object's essence isn't determined by its appearance, but it's appearance can be altered when we learn something new about its essence.
The meaning of an object, individual or group, and the pleasure that we derive from it is largely driven by its essence. Paul Bloom describes this in his book, How Pleasure Works.
If an art dealer shows me a Picasso, I might think that it is the most beautiful painting I've ever seen. I'm likely to spend a fortune in order to buy it, and will probably hang it in the best spot in my house. If, six months later, somebody then tells me that it's actually a forgery then my perception of the object is likely to change completely.
Even though it's outward characteristics are identical, I might suggest think that it just looks okay. Nothing special. It's appearance is exactly the same, but its essence has changed.
You can apply the same thinking to more complex social identities. I might think of myself wholeheartedly as a Jew, agreeing with Jewish beliefs completely and adhering to Jewish practices meticuluosly. I'd wager that most people would see me then as a Jew... until I tell them that niether of my parents were Jews, and that I converted in my teens.
Then, in the eyes of some, I'm no longer a Jew. I might think, act and dress as a Jewish person, but for some people I'm not
really Jewish; I lack the essential ingredients that defines a Jew.
Great artists can cultural groups obviously hold a lot of meaning, but the same essentialist thinking can be seen in very trivial circumstances. In social psychology experiments, minimal groups can be formed on some arbitrary rule like a coin choice and people will still come to attribute some essential qualities to the other groups.
People perceive objects and groups as possessing an internal, invisible, essential quality that determines their belonging to a certain group. Paul Bloom reviews some evidence that young children hold similar views regarding the categories of male and female.
I think that essentialist thinking is a much more likely explanation of why a person may be less attracted to a person if they were recognised as a different sex at birth. In some cases, it may be down to prejudice or fear of social reprieves, but not necessarily. Some people here have said that it would impact a relationship, but haven't been able to explicitly say why, other than it would... somehow. Or that it wouldn't "feel" the same.
In these cases, where a person's response is likely to result from a kind of cognitive reflex, then I don't think it's fair to describe a person as bigoted, or anything else.
Of course, for many people, it won't be an issue. It may not have any impact on how a person views their partner and if it does, then it doesn't have to be a negative one.
I don't think that transgendered people are obligated to tell people about their past anymore so that I'm obligated to tell my boyfriend about my past. On the other hand, although transgendered people don't have to tell their girlfriend/boyfriend about their past, I do think that they should.
If it were me, then I think I would be pretty upset if somebody had kept that from me or felt like they couldn't tell me. Also, I think that it's important in relationships that people feel safe and secure enough to share that level of intimacy with one another. Everybody deserves to find somebody who can love and accept them completely