John responded to a newspaper advert by Leicester University asking for people who have traced their ancestry to give DNA samples for a study on world populations.
He said: "The scientists took some of my DNA away for analysis and then one day they called me up and were very excited. They said I had a Y-chromosome that was extremely rare. I was flabbergasted. I had no idea that I was so culturally unique. But I am not going to start eating couscous and riding a camel." [Link]