Neo Free Cities (thread
here)
Free Cities Rebirth
Only the best slaves. Their minimal requirements depend on the other FSs.
Yes, definitely.
Not sure. Iirc you couldn't anymore, once it was fully developed. More than one anon asked to get rid of it, but I don't know if it has been implemented or not.
Options -> Game options -> Content & Flavour -> Experimental male pronouns are currently:
Enabled
No clue. Does he have testicles? Chastity cage?
Are other slaves fertile? If they are too young / beyond menopause / using contraceptives / already pregnant, they are not available of course.