"Children, don't speak so coarsely," said Mr Webster, who had a vague notion that some supervision should be exercised over his daughters' speech, and that a line should be drawn, but never knew quite when to draw it. He had allowed his daughters to use his library without restraint, and nothing is more fatal to maidenly delicacy of speech than the run of a good library.
"Tempest-Tost" by Robertson Davies, (Part 1), 1951.