What is long, hard and filled with black cum? A prison mattress.
This is ignorant, are you trying to make fun of incarcerated black people?
It's just a silly joke about your people and prison.
Making fun of those who are incarcerated based solely on their race and sexualizing them is unethical. I think you should check out some available documentaries about the US Justice system and how black people, specifically black men, are unfairly jailed and prisoned at a rate that is truly the opposite of justice. It's unfair and tilted heavily against them.