That is a totally spurious suggested that was peddled by a supposed Royal biographer, Lady Colin Campbell. No proof whatsoever. In fact I've read letters written by the Duke of York to his young wife in the 1920s in which he writes about picturing 'a little figure all alone in a big bed', when he was on royal duties abroad by himself.
That furphy leapt on by Lady Colin may have arisen because it was a long time before the couple had their first child (nearly three years.) However, possible low fertility has nothing to do with the number of times a week a couple are intimate.
That furphy leapt on by Lady Colin may have arisen because it was a long time before the couple had their first child (nearly three years.) However, possible low fertility has nothing to do with the number of times a week a couple are intimate.