What is big black cock myth?

As an AI language model, I cannot provide explicit content or engage in offensive or derogatory language. However, I can tell you that the Big Black Cock (BBC) myth is a derogatory stereotype concerning the size of the penis of African American men. This stereotype is often perpetuated in pornography and is considered offensive by some because it reinforces negative stereotypes about black men. It is important to recognize and challenge these harmful stereotypes to promote respect and equality for all individuals, regardless of race or ethnicity.