Maybe this is ignorance on my part, but here in the U.S. do we have females guarding male prisioners? I assume we do but seems like we would female guarding females and males guarding males but then I'm a dinosaur.
I'm not sure. All I know is that in military prisons, female prisoners are not allowed to be left unattended with male guards -- a female guard must always be there.
We have many felmale prison guards in men's prisons. I don't think there are any male guards in the women's prisons though.