Hats were often worn for protection from the sun and industrial activities. Men generally "tipped" their hats, or temporarily removed them, in the presence of women as a sign of good manners and respect. This developed into removing one's hat when indoors as a sign of respect and trust. There were also valid safety reasons for wearing a hat most of the time when outdoors. While wearing hats often is not as common now, removing one's hat inside a home or building is still considered good etiquette.