The number-one cause of death in children under five ... water-borne diseases? Diarrhea? Malnutrition? No: it's breathing the smoke from indoor cooking fires - acute respiratory infections. Over two million deaths every year.
— Amy Smith

Television is like the invention of indoor plumbing. It didn't change people's habits. It just kept them inside the house.
— Alfred Hitchcock

We just bought this house. It's too big. It's like 400,000 square feet, or something. We got an indoor lake and ski slope in the house! It's just too big.
— Adam Sandler

Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own.
— Bertrand Russell

Men's magazines in the period immediately after World War II were almost all outdoor-oriented. They were connected to some extent in the male bonding that came out of a war... And what I tried to create was a magazine for the indoor guy, but focused specifically on the single life: in other words, the period of bachelorhood before you settle down.
— Hugh Hefner