Or when they are brushing the teeth https://www.quantamagazine.org/20170328-statistician-proves-gaussian-correlation-inequality/ https://www.quantamagazine.org

Or when they are brushing the teeth https://www.quantamagazine.org/20170328-statistician-proves-gaussian-correlation-inequality/ https://www.quantamagazine.org/20170328-statistician-proves-...