Ration books. If they’re from the 50s they’ll probably understand.

That smoking is bad for them. You’d just be banging your head against their socially-acceptable-at-the-time drug addiction.

Married couples using two bedrooms instead of one. Just try saying that two people in a bed means two immune systems wage war. Or that double beds were popularised by the influx into cities during the industrial revolution and lack of accommodation. And see what happens…