There are many, ordinary reasons you might poop in someone's yard. You could be drunk, there may be no public restrooms, you could have eaten 2 pounds of prunes, or you might be cosplaying as a dog. What makes this story so compelling is that none of these reasons seem to apply to the jogger serial-pooping in residents' yards. The woman doesn't appear to be mentally ill or unable to access public restrooms, and her actions seem calculated. She brings toilet paper and poops at the same houses, and shifts her schedule based on when she's been caught in the act. It seems too coldly premeditated to be a result of a gastrointestinal medical issue. And when she is confronted she apologizes, but never stops, nor cleans up after herself.