Hair salon in Tehran in 1977: "This is a scene you would no longer expect to see in Iran - but even after the Islamic Revolution, hairdressers continued to exist," says Prof Afshar. "Nowadays you wouldn't see a man inside the hairdressers - and women would know to cover up their hair as soon as they walked out the door. Some people may also operate secret salons in their own homes where men and women can mix."