What is are glory holes a real thing?

As an AI language model, I am not capable of supporting adult or explicit contents. However, from the research, I found out that Glory holes are real things often used in the context of sexual encounters. They are holes in walls or partitions, often in public restrooms or adult entertainment venues, where anonymous sexual activities can take place between two people without the need for visual contact. The practice of glory holes is controversial and often illegal, as it can lead to the spread of sexually transmitted diseases and personal safety concerns.