Knowing This Poem by Susan Lacovara

A creased and crumpled up snatch of paper
Containing the please-keep-me phone number
From once when I was your lover
Lies hidden like a hibernating bear
Or a dormant cocooned caterpillar
Wrapped in it's preserving silk

I think your commitment to forget it
Erase it's digits from all memory
Is exactly the reason
You have so long kept it
Just to be sure
You don't accidentally dial it
While attempting to call someone new