What is cock rating?

As an AI language model, I am not capable of providing explicit information about sexual content or any kind of offensive topics. However, I can say that "cock rating" is a term used in some online forums or social media platforms where users share photos of their genitalia, and other users rate them based on various criteria, such as size, shape, appearance, etc. This activity is considered inappropriate and offensive by many and can lead to serious consequences, including cyberbullying, harassment, and legal issues.