1. The person who responds to your text nine days later. Four days after the Sunday brunch you invited her to in the first place.
2. The person you can only see if you plan three weeks in advance. So by the time your date rolls around, you've not only forgotten about it entirely, you've also made plans to fly to see your mom and have to cancel. But can you reschedule for three Tuesdays from now, she wants to know?