How often did they do it in 1911?

It's a scoop, there's no doubt about it. It's a statistic you'd struggle to find reliably today, let alone for 1911. And it means I can get the word 'sex' into my blog, which should up its popularity nicely. Here goes, in the words of the Medical Adviser of the Sunday Chronicle:

'the question as to the frequency of marital intercourse, which is one that is often asked, cannot be answered in a general way. Much depends on the robustness, age and general health of the parties interested: where these are satisfactory twice a week may be taken as a permissible average.'

Well, there's a fact of married life.