Hey, @Sashira, I know that fantasy of the late medieval/early modern Europe variety isn’t your cup of tea, but just to respond to your question about XoR… the game tries to make clear that in its sex-scared, anti-promiscuous society, the chattel class does have greater freedom to sleep around (not having the same consequences from loss of social reputation).
Like many lower classes throughout history, they don’t internalize the code of proper conduct quite as intensely as the upper classes. (The uppermost classes have a similar freedom to disregard it, though for the opposite reasons).
But because in this setting, the lower classes are also routinely slaughtered to fuel blood magic, there’s also a strong social interest in their rate of reproduction. Non-breeders are more likely to be selected for slaughter, whether their childlessness is due to age, barrenness, or sexual orientation.
Hence even in a culture which is otherwise untroubled by same sex relations and actively hostile to the idea that the primary purpose of sex is reproduction, a strong pro-natalist drive for helots has come in through the demands of the blood economy.
As idnlun said in the other thread, some priests have taken that pragmatic idea to its natural conclusion and are slipping into the heresy that the purpose of sex is reproduction – if only for helots.