Another historical detail about The King's Speech

Alexander Cockburn mentioned this in his column on counterpunch.com:

The inhibitions that prompted the stutter extended to other regions of the King’s body, as Kitty Kelley narrates in her fine book The Royals. Sexual dysfunction plagued poor George VI. Elizabeth and Margaret were conceived (respectively in 1926 and 1930) with the help of artificial insemination, donor undisclosed. Actually, since the sisters did not resemble each other, we can assume two donors were involved.

Something like 40% of Americans have royal ancestry. Or do they? The current British Royal Family may not have any royal ancestors.