Debrett's, the authority on etiquette and behaviour founded in 1769, has published a guide to dating for over 50's. Almost 1 million over-50s consider using dating sites but aren't always sure how to begin. Their manual is aimed at on-line dating users and is intended to help the over-50s singles “tackle modern dating dilemmas” — the most notable, of course, being “how do I turn my computer on?” and “why does this man want to marry me (and borrow £100,000 at the same time)?”