I've been lurking in this thread for a while, I must admit I don't have much knowledge in terms of people that are transgenered, or much knowledge on the difference between sex and gender so I've found this thread pretty eye opening and educational. There is one thing that I don't really understand about what is going on in this topic though, and that is something along the lines of 'How can a straight guy reject a trans-woman based on other reasons other than fertility?'
Now I don't think I've ever met anyone that is trans, let alone started a relationship with someone who is. It is great that we live in a time where people who are trans can have the corrective surgery to make them the gender/sex they want to be, and I think that if I were to meet someone that is trans I wouldn't judge them or treat them any differently than anyone else. However, if I were to date a girl and later find out they were trans, I have to admit that would probably freak me out quite a lot and would probably put me off wanting to take things further. I can't say that this would happen 100% for sure because I haven't been through it, if they were amazing enough in other ways I think I would be open minded enough to reconsider, but putting myself in that situation in my head that is generally the outcome. What I can't see is how this is a bigoted or unacceptable response.
The reason being is that even though you are a female mentally and physically, you were still born physically as a male. I don't think there is any disputing this fact, you can't change that. That is what makes you different from another woman, and aside from the fact that I do actually want kids one day, why I would stop being interested in someone trans. I personally don't think I could get past that thought that they were once male. Again, I can't say this 100% for sure, but that is how I would probably react. I don't feel that is bigoted, and as I've said before, I would be open minded enough to reconsider if they really were amazing. But it would be an issue for me, possibly because of my lack of knowledge on the subject, who knows, but I think calling that bigoted or unacceptable would be unfair. I would never spread bigoted hate about anyone, and I would never treat anyone differently from face value, but I think that at a more intimate level, I do think that things are different. Everyone is more judgemental in this way, and sometimes it is in an irrational way, so I can't see why this would be any different than me not finding someone attractive because of their race, or their eating habits, or their teeth to gum ratio.
Also, what SmokyDave said.