girl 1: my latest flame was so prude, so i suggested a game of 'a' day, 'b' day
a game for 'couples' in which one person is 'a', and the other is 'b'
"girl 1: my latest flame was so prude, so i suggested a game of 'a' day, 'b' day" What is the definition of "'a' day, 'b' day"?