Weekly queries for the term “sex” for a group of representative western Northern countries. The black line represents the averaged queries in a 10-year period, obtained from Google Trends, which is normalized by overall search volume. These countries are: Austria, Canada, Denmark, Finland, France, Germany, Italy, Lithuania, Malta, Netherlands, Poland, Portugal, Spain, Sweden and the United States of America. Shaded grey represents the standard deviation. The red vertical line marks Christmas week.