HAVING regular sex helps you become a better public speaker, a study claims. But it has to be the real thing. Full sex, with a partner of the opposite sex, works better than any other kind of "gratification", according to university experts. Other forms were not as effective in calming the nerves and relieving stress but were still better than no nookie at all. The University of Paisley asked 24 female and 22 male volunteers to keep a fortnight's diary of their sexual activities, detailing what they did, when and how often. After the two-week trial, volunteers undertook tasks including...