Once upon a time

 Once upon a time there were people who knew how to prop. They did many other things as well but those other activities were never as good as propping. They ate, they spoke and they did everything that could be done together. They were not always only in groups of two people, as one would expect from a romantic couple. Proppers were rather comfortable in large groups as they were in huge spaces. They maintained a sophisticated attitude toward life. But when they propped, it was for propping.

They knew only how to prop.