zippipi

Are you aware of why prisons are, or were up until recently in some states, segregated by sex - why we have separate female and male prisons?

You should elaborate on why you believe these are comparable.

For example, consider a male convict who desires to be incarcerated in the female prison estate. Is it really civil rights discrimination to deny him this? If so, how?

Most importantly, what about the civil rights of the female prisoners he would be incarcerated with, if this were permitted?

Most of that legislation is to protect the sex-based rights of women and girls, or to safeguard children from medical harm. When you examine the details it's not really going against anyone's civil rights.