Rome - An Italian psychologist has replaced metal lock and key with computer chips to design an electronic chastity belt for the 21st century. Prof Giuseppe Cirillo said yesterday he expects to find a promising market among suspicious-minded modern couples for his old-fashioned yet revolutionary creation, Philip Willan reports from Rome. Attached to the elastic of a normal pair of men or women's underpants and about the size of a packet of cigarettes, the "chastity timer" records the frequency and length of time that the undergarments are removed. Prof Cirillo said he would be demonstrating his invention when he went on a conference tour to London, Amsterdam, Toronto and New York in the autumn.