Is PMS your sweet excuse to indulge in “forbidden” foods like chocolate? Georgios Tzenichristos, director of London’s LipoTherapeia clinic, finds out. What if chocolate cravings, experienced by 50% of women before their period, were the result of culture rather than a natural physical response? Scientists at the the State University of New York seem to think culture could be the culprit. In a recently published paper they have shown that out of 275 women of diverse backgrounds, foreign-born women were half as less likely to experience menstrual chocolate craving than women born to U.S.-born parents. And, they were two-and-a-half times less…