 Sex education, he argues, is a form of propaganda against Christian sexual morality.Again, the sexual revolution brought about by the first contraceptive pills was the result "not of accidental discovery, but of research deliberately pursued by moral revolutionaries".He describes the efforts made to provide respectability for unmarried motherhood, not least the campaign to replace the expression "unmarried mother" with "single parent", thus lumping together those who had children out of wedlock with widowers, widows or deserted wives and husbands, and so deflecting disapproval.