In summer: you need a shower to wash the sweat off In winter: you need a bath to get as warm as possible before going to bed. Until recently (~1980s-90s) house

In summer: you need a shower to wash the sweat off In winter: you need a bath to get as warm as possible before going to bed. Until recently (~1980s-90s) houses were expected to be ephemeral, whether they were knocked over by an earthquake or the new owner, so people skipped "luxuries" like insulation.