A recent research conducted by the American Institute of Social and Civil Research (AISCR) ranked Chicago as the number one city in US for kissing.
73% of women between 19 and 60 years have already kissed some stranger in the streets, whereas 42% did it more than once in the last couple of years.
The study also analyzed seasonality and observed that end of May / start of June is when the occurrence peaks.
Also it showed evidence, with no specific reason, that brazilian doctors are the preferred target.