[zeristor]

Yikes.

But didn’t they also take female slaves too, some being concubines?

[dudeinjapan]

Yes, certainly, they raided European coastal villages. But AFAIK the majority of captives would have come from captured merchant ships, which were exclusively men. The pirates weren't so into keeping accurate records.

[ransom1538]

There are volumes of books on it.

https://m.media-amazon.com/images/I/51hXkmBB-YL.jpg