> adding mass to objects even when their main purpose depends on users moving them. I read somewhere that automakers spend a lot of time designing their car do

> adding mass to objects even when their main purpose depends on users moving them. I read somewhere that automakers spend a lot of time designing their car doors for the sound and feel when you shut them. Consumers perceive a door that feels heavy and substantial as a luxury product. Sorry, don't have a reference for this factoid.