Last week, Firaxis released Rise and Fall, the first major expansion pack for Civilization 6. It comes with all the usual new features - some new mechanics, buildings, several more historically significant leaders, and so on. But it also brought some smaller, under-the-radar changes - one of which in particular has had a mixed reaction from fans.
The issue centres around Firaxis' addition of more Hidden Agendas for its various leaders, and a couple of those new Agendas in particular: "Flirtatious" and "Curmudgeon". The former means a leader will like other civilizations that have leaders of the opposite sex, and dislike those of the same sex. The latter the opposite: disliking the opposite sex and liking those the same as their own.
If you're not familiar, Agendas are basically the goals, or playstyles, that are given to for each AI-controlled civilization's leader in a game. They come in two forms: fixed agendas that generally suit that leader's overall theme, like Queen Victoria's desire for imperialistic expansion with "Sun Never Sets"; and Hidden Agendas, which are randomly assigned and a bit more light-hearted about adding personality - maybe a leader is "Fun Loving" and wants to keep their citizens well entertained, or "Nuke Happy" and won't hesitate to pelt you with a few ICBMs when the mood takes them. These new ones fall under the latter.