Confused by some lines from a film.
I watched an old British film and I really like it, but there's some lines I can't understand and I can't find any English subtitles of this film. I don't know if there is someone could help me to write down those lines. Thanks in advence. Here's the video which I cut out of the film and the part that I can't understand begins from 3:17 and ends at 4:59.
https://www.youtube.com/watch?v=-dSRIw8fT78

Question

Answer

"How did I start? Oh, darling. Starting's the easy part. It's keeping going that bothers you.  Well, I started during the war, actually. First one was a Yank. I thought a lot of him."

...any other italki members wish to continue? :)