The young man coming to my door with the preposterous offer
Is painful not for the visitation
Rather, memory of my own youth - its optimism and naivete.
The sort of thing that makes you think
That a bottle of detergent can conquer the world
And does, until you meet it.

Bill Grace

http://www.poemhunter.com/poem/young-man-selling-at-my-door/