That might not be a bad business to start: "Get to know your origins, men! Give us a bit of your inside cheek (the scraping won't hurt a bit) and we'll tell you what's in your background! Perhaps a bit of a Dutchman or a Swede, an Italian or a Mede! A Slav, or a Jew, a Moor or Bantu!
I'm just being silly, but maybe we can start an internet Freeper business doing this--whatcha think, Jim?