Pirates

I know pirates “arrrre” a real thing on Earth, but I find it interesting how they “arrrre” portrayed in movies. They “arrrre” constantly surrounded by water, yet they “arrrre” the filthiest looking bunch you could ever expect to run across on the high seas.  Makes you wonder if they “arrrre” afraid of getting wet.  Maybe if they bathed once in a while they wouldn’t have as many eye infections!  And what’s up with their love for the word “arrre”? Is it like people’s over-use of the word “um”?