I 'want in the Ladies' because it is the appropriate door for who I am.
Robin,
There was an excellent post by Barraker regarding this on a now deleted thread.
I apologise in advance for my lack of comparative eloquence in summarising her point, but feel it applies just as equally to the prison debate as toilets and other single sex spaces.
Barraker suggested a thought experiment where there were 2 sets of toilets with identical facilities.
Which one would you use, firstly in the case they both had no sign and secondly in a theoretical situation where they were labelled Male/female but the women used the facilities labelled Male and vice versa?
Remember the toilets are identical so from a purely functional point of view either would meet your needs.
So why is one facility more appropriate than the other regardless of the sign on the door or the facilities?
The answer is simple.
The facility that is deemed more "appropriate " to you is the one that you observe adult human females using.
You're effectively using your right to observe sex (not gender identity) to qualify what you feel to be appropriate spaces for you to use, whilst denying the rights of the women using those spaces to do the same.
The whole trans lobby promotes this fundamental lack of parity with regard to single sex provision whether it be toilets, prisons, DV services/shelters whilst peddling the line that sex is "assigned" not observed whilst using observation as the very cornerstone of determining which spaces they should be able to access on the basis of "equality".