BP said:Historically, navies were the projection of power and pride of many countries. Looking their absolute best was probably equivalent to law - hull art would probably be considered vandalism at best.
That's true, but you're forgetting about mastheads, which were decorative and which were considered good luck. They went out of favour in our culture, but that doesn't mean other cultures wouldn't still keep the tradition in some form or another.
/Devil's advocate