Valentines Day is here again, encouraging amorous activities. Alice Murphy, writing in the Australian Daily Mail, says our sense of smell is heavily responsible for who we are magnetically drawn towards. According to science, she claims, there are the five most sensual scents, all plant-based: chocolate, rose, citrus (lemons, limes, oranges), mint (peppermint or spearmint), and lastly vanilla. Here's hoping she or others are not allergic to any of these.