Elizabeth Daingerfield Zwicky writes:
My new employer has a sign in the bathroom exhorting us that for safety reasons we should not use the bathroom for “bodily hygiene”. That’s what the showers in another building are for. Scofflaw that I am, I persist in washing my hands.
It turns out that usage differs on how much bodily hygiene covers. For Elizabeth’s new company, it refers specifically to bathing or showering, that is, to washing the body, and similarly for historian and anthropologist Alan Macfarlane in an article on bodily hygiene in England:
Buchman writes that ‘probably not until 1850 did regular personal washing become routine in large numbers of middle-class households,’ Plenty of literary and other material can be found to support such a view. For instance, a doctor writing in 1801 remarked that ‘most men resident in London and many ladies though accustomed to wash their hands and faces daily, neglect washing their bodies from year to year.’
On the other hand, there are sites (like this one) that specifically mention “hand hygiene” (washing the hands) as a type of bodily hygiene.
(I’m not sure how washing the hair fits into this picture, but I’ll bet that Elizabeth’s company doesn’t want people washing their hair in the bathrooms.)
Some of the variation in usage no doubt arises from the fact that bodily hygiene and personal hygiene are “semi-technical terms”, not really part of everyday English, which are pressed into service, essentially by stipulation, to refer to categories that have no simple everyday labels.
