exchemist
Veteran Member
It may not be quite that simple. In the Edwardian era it was common for married couples to have separate beds. My maternal grandparents did, for instance. So it may simply have been that the return to the double bed in the middle of the c.20th took off earlier in Europe than in N America.This has nothing to do with "ages", but with American censorship laws that were later repealed.
European couples were quite capable of sleeping in the same bed during the same era of film.
More here: Rolled over: why did married couples stop sleeping in twin beds?