A pirate is a sea god messenger of the Most Holy One.
These most holy creatures of the sea rise up to pwn the wicked and steal all their cool shit. Whatever they can't steal and sell for more booze will be raped, burned, or raped then burned. If you're male you either join the crew or are raped and burned with the rest of the unsellable town. If you're a black male, you either join the crew or get sold as a slave.