DEMACIA: Nobles are expected to marry and produce heirs to continue their line. Adultery is considered disgraceful, regardless of the gender of the partner, because it’s breaking a vow. Likewise, illegitimate children cannot inherit so for nobles, a marriage that produces children is a must. Same-sex lovers, pre-marriage, is acceptable for nobles. For commoners, same-sex marriages and relationships are fine. Asexuality is considered a sign of being dedicated to whatever your profession is ie ‘too into their job to care about anything else’. Trans people are accepted without question, except for the aforementioned heterosexual noble marriages. Intersex people are raised as whatever the parents think fit until they’re old enough to decide.
NOXUS: Again, nobles are expected to marry and produce heirs to continue their line. A marriage that will result in at least one child is a must for the heir, though second-born and third-born children have more freedom to choose. Adultery is accepted as long as it’s discreet and won’t shame your wife/husband. Same-sex partners for adulterers are preferred because then there’s no risk of bastards.
For commoners, same-sex marriages and relationships are fine. Asexuality isn’t commonly known/understood. Trans people are fine and their genital configuration only matters for the noble marriages. Intersex people are treated the same as any other Noxian.
BILGEWATER: Do whatever and whomever you want as long as it’s consenting. Marriage between all genders as well as polyamorous marriages or multiple spouses is accepted as long as all parties consent. A man cannot have 3 wives and 2 husbands unless they’re all aware of each other. Of course, that’s only in theory. In practice, he just needs to find a drunk enough officiator to carry out the ceremony. Asexuality is most commonly interpreted as people who love the sea too much to take other lovers. Trans and intersex people are wholly accepted.
IONIA: Arranged marriages are common, both homosexual and heterosexual. It’s less about having children and more about alliances between families, though the sexual preferences of the person being married off will be taken into account. Divorce is uncommon because of familial pressure. Asexuality is accepted and praised as a sign of being free from physical desire. Intersex people are believed to be in perfect balance and cherished. Trans people are thought to be rectifying an imbalance in themselves and their chosen gender identity is accepted.
PILTOVER: Same-sex marriage and relationships are just as normal as heterosexual ones. So is asexuality. Nothing is considered special or weird. There aren’t even any anti-discrimination laws in place because it’s just that much of a non-issue. Non-binary, trans, intersex, it’s all fine. Piltover is the future and the future is good.
ZAUN: They keep trying to tell Noxus that they can grow babies in test tubes and those heterosexual marriages for nobles are not necessary. Noxus is more interested in the idea of vats full of baby soldiers however. Same-sex and heterosexual marriages are treated equally and discrimination based off sexuality or gender doesn’t happen. They pioneered sex-change operations; intersex babies are left alone until their teens hit, then they can choose what changes they want made, if any.
FRELJORD: Everyone’s too busy trying not to freeze to death to care who shares whose bedrolls. Homosexual relationships are considered a safe way to enjoy yourself without worrying about bringing more hungry mouths into the world. There’s no stigma against it, nor against trans, intersex or asexual people. Though asexuals had better like cuddling because, again, cold.
SHURIMA: No bias based off sexual preferences or gender identity. Harems and group marriages are legal, as long as all parties consent. Adopting a nephew or niece if you need an heir but aren’t in a heterosexual marriage is considered perfectly acceptable. Illegitimate children can be legitimatized in a pinch as well and then inherit.
BANDLE CITY: They are tiny but full of love for everyone, regardless of gender or sexuality. Polyamorous marriages are accepted. Trans and intersex yordles are accepted without question, as are asexuals. Marriages can occur between any genders and divorce is not stigmatized. Sometimes people change and move on. That’s nobody’s fault. Adultery, on the other hand, is awful. Why would you deceive a partner like that?
VOID: Can it be eaten? It can? YES. EAT IT. That’s it. That’s as far as Void preferences go. Void creatures couple regardless of their partner’s gender. Gender identity isn’t really a thing. If Rek’Sai wants to be male, okay, Rek’Sai is male. As long as Rek’Sai doesn’t eat them, they don’t care.
SHADOW ISLES: They’re dead, Jim. Less hungry for sex, more hungry for souls. Nobody cares who fucked who when they were alive. Or what gender they are or what parts they had between their legs back when they were flesh instead of skeletons. The more fleshy denizens, like Evelyn, are equally indifferent to all questions of gender and sexuality. Their only concern is ‘does it have a soul? Can it suffer?’