Because they all secretly want to be pirates and marry a gorgeous blonde with much prettier clothes than I get to wear. (My 14-year-old just turned up and mumbled, "Well, I didn't like it that much ...". He's offended by the concept of girls.)
Well, that explains another phenomenon.
Dh discovered the “Pirates of the Caribbean Online” game. Some nights he must stay up ‘till 2 am playing that thing.