The idea of a “gay earring” is a stereotype that has evolved over time and isn’t a universal or widely accepted symbol today. However, there used to be a belief that the left ear was associated with being gay and the right ear was for straight men. This came from cultural rumors and misunderstandings that started in the 1980s, particularly in the U.S., but it’s not something with any real basis or significance.
The notion of the “gay earring” was more of a pop culture fad than a serious symbol, and it faded as people moved away from such rigid ideas about gender and sexual identity. These days, earrings or jewelry on either ear don’t have a particular meaning related to sexuality.
In short, there’s no definitive ear for a “gay earring”, and it’s best to view earrings as simply a fashion choice, not a statement about one’s sexual orientation.