I'm serious - they don't have window screens in the UK. I found it quite odd, but a couple of my British friends swear that they don't have any bugs so they don't need screens.

Window screens have been standard equipment in U.S. houses for generations, so I don't think it's that the U.K is behind the times or anything. Unless they're centuries behind the times, which they sure didn't seem to be when I've been there. :)