you go s*** 1 time a day on average, but one day go 10, you regress to 1.2... cuz you go back to average, with a little bit extra cuz maybe a infection subtly changes your microbiome
you go s*** 10 times a day on average, but one day go 1, you regress to 2... cuz probably you figure out something, like you have celiac disease, and you solved problem
sometimes it's not symetrical... if good reason for outlier, you don't regress very far back.