To soldiers who "read" their shirts for the vicious grey beasties that infest fighting men far from water, the German Army issued a stern order (captured and broadcast by the delighted Russians):
"Recently there have been many instances of envelopes mailed at field posts containing live lice to show to families. The senders do not realize the danger . . . of spreading typhus. ... A mutual comradely education must prevent the country from being subjected to such acts."
A Scot who spied a louse on a lady's bonnet in church had said it with more sprightliness:
Oh, Jenny, dinna toss your head,