Social Interaction With Fairies Change Romantic Preference
A couple days ago, I was having an issue with my sim's romantic preference changing from men to men & women whenever he interacted with Zhaleh Amani. After changing my (at the time) current Sims 4 folder to Sims 4_old and repairing my game. I located two mods folders buried in my saves folder, that I believed were causing the issue. Those folders were removed and my game repaired again.
Just now in game. My sim is having a dinner party for Winterfest. He invited mostly fairies. He was having a conversation with Care Ren asking for fairy dust, and they formed a romantic relationship. Since I've had this same issue occur twice with fairies, I have to conclude that fairies are the issue.
He's spoken to non fairy, female sims without this change occurring.