Public Punishment of Slave Men
In many gynocratic, female supremacist societies the objectification of men is total. They aren’t even regarded as being of the same sex as the female. Men are not seen as human. From this stems the usage and treatment of male slaves disturbing to those living in more humane civilizations.
Erring male slaves are punished with public bondage of varying sort. Often the disciplined slave is left for the abuse of strangers. The idle or casual sadist is welcome to degrade or physically hurt the slave. The only limitation if maiming the slave. This would prevent the slave from future use.
The slave anticipatory fears often have more effect than the actually humiliations imposed on the wretched creature. Slaves rarely require further public punishment.