If you want to have a discussion of this topic without being labelled transphobic, it would help if you would go back to posts like this one:
No. I just don't want to be labelled as anything solely based on my willingness to discuss the issue. Which is what happened here. As I say, it's a trap - "either accept my viewpoint or the very fact you're prepared to discuss or challenge it shows you to be wrong". it's terrible thinking.
...and actually acknowledge that this is an important point, and acknowledge that you missed the target when you initially claimed that you get to choose the person's gender. Because that makes the difference between establishing legitimate boundaries for your own sexuality, and being a dick to a marginalized person.
It's not the lack of knowledge that's the problem, it's the apparent refusal to reconsider new knowledge.
I must respectfully disagree.
I can lie, if you like, but my gut instinct, my biochemical, sex-related bits that get to make all those decisions isn't subject to reasonable, rational, modern, open thinking. It sees cock, it thinks 'man'. I don't know if I can change that. I really don't think I can.
As I have been at pains to point out, in every other area of life, I will accede to the wishes of anyone who wants to be labelled anyhow. In social situations everyone gets to define their own gender and I have no issues with that - I really don't care what anyone brings into the lavatory, we're eliminating, it's irrelevant.
However, in the one and only area in which it becomes relevant in any way to me, that of my own sexuality and my compatibility with whoever it is that's propositioning me, then my actual reasons for declining are that my genitals do not think they are female.
In response to your excellent comments, I wouldn't make an issue of it. I might go with your 'I don't like cock' line. That's something I might not have come up with on my own.
However, if you want me to be honest about my deep, visceral, biological reaction, then the actual reason is that my genitals, my libido and my sexuality would see cock and think 'male'.
Sorry.