After all this talk of the perils of modern technology I thought a change of pace was called for. This is from the era when all a gentleman had to worry about his housekeeper finding his erotic etchings hidden at the bottom of his study desk drawer. This is entitled ‘Mistress and Slave’ and dates from between 1910 and 1920. The telephone had been invented by that time, but we were still about 60 years away from the internet and 80 years from the smartphone.
I found this via the History of BDSM tumblr.