Who is Kurt Rainer from The Spy Who Loved Me and what is their importance?

Kurt Rainer is a writer who works for an agency similar to Reuters. When Kurt learns Viv is a strong writer, he hires her to be his assistant. Viv and Kurt work closely together for a long period of time in which they become good friends. Kurt becomes engaged and shares with Viv his plans for his marriage, including his sexual plans. When Kurt's fiancé breaks the engagement, Kurt turns to Viv for comfort.