Why do you never see black people on cruises? They're not gonna fall for that one again.
Are you making a joke about African Americans being brought to the US as slaves?
Yes, I am, I thought it was a funny joke.
Slavery was a horrible part of the US's history and should not be referred to in a joking manner. You should read more about slavery and the horrors of it, it will help you to understand how painful a joke like that is for African Americans.