ELI5: Explain Like I'm 5

Compulsory heterosexuality

Compulsory heterosexuality is when society expects everyone to only be attracted to and have relationships with people of the opposite gender. This means that people who are not attracted to the opposite gender or who want relationships with people of the same gender as them might feel like they are not allowed to do that. But everyone is different and everyone should be able to choose who to love and who to be in a relationship with.