read secretly

Ask each girl to write down her name on a piece of paper along with approximately how many times she has fantasized about being fucked by more than one guy in the last week.

Next, show the girls the attached gif and instruct them to stand in a row with their backs turned to each other. Then, choose the most innocent girl (i.e. the one with the lowest number) and roughly handle her like in the clip. Strip her naked and spank her for 15 seconds so she'll never forget that it's better to have a dirty mind. All other girls get one point each. Well-done!