Is it illegal to sit in a car with a lady?

'Emirates Evening Post' a seemingly obscure newspaper, with a not-so-remarkable editorial content, has again raised some uncomfortable questions, albeit unintentionally through their 'Ask your Lawyer' column.
A man and a woman, not legally related (can be friends, colleagues etc) are "not supposed to sit together in a car, or go for movies, or to restaurants etc.. " says the matter-of-fact lawyer to a bizarre question.
Wonder why some half-dressed male and female models clinging together in a showroom opening of an international brand as seen on a popular newspaper doesnt make the cut.