There was a woman with 100 children.
She lacked the creativity to name all of them so she just names them 1-100.
99 of the kids die. The only survivor is the kid named 90.
90 grows up and has kids of her own. One day, the kids find a stray dog.
90 did not want them to keep it. The kids decide to keep the dog secretly.
They name the dog “this” so that they can say things like “Let’s take this outside” without 90 finding out.
One day, this suddenly dies in a car accident.
Only 90’s kids remember this.