Transexuals

[Mystic]

Women's comfort level (embarrassment) with pooping/peeing/changing/showering in front of people who are still men on the outside is the ultimate reason.

But this type of comfort level can be tempered by the mind if we understand the nature of transgenders.  We should in this instance put their well being over our gut knee reactions to the issue. I know Quran makes an exception to men who have no desire for women, they can see women without Hijaab. Some people say this referred specifically to people who their privates cut off for unjust reasons, but I think by definition it can be extended to transsexuals.