Kroger's algorithm wicked-accurate

...says the coupon I get on the day I start my period.

That makes Kroger more on top of my menstrual cycle than I am. For over half of my life now, there is a week, once a month, where I am a little weepy and incredibly hard on myself, and where I look in the mirror in the morning, and I think, God help me, is this what I look like now?! And every damn time, for over half of my life, I act surprised when this period of confusion is followed by an actual period.

This coupon printed before I started scanning my groceries, so now I am fascinated to know how my buying habits differ pre-period. (Obviously they do, or Kroger wouldn't have known.)

For nerd-reading on how stores track your every move but try not to be too obvious about it (though I'd say Kroger failed the creepiness test this time around), here is an article.