Counting to 13

     I am a long-time New Yorker subscriber and what a delight it is, occasionally, to open a new issue of the magazine and find that one of their poems has links to mathematics. Such happened for the issue of April 2, 2-18 -- on page 70 of that issue is the poem, "Who Knows One" by Jane Shore.  
     Shore's poem features thirteen stanzas, one for each of the counting numbers 1, 2, 3, ... 13.  The nth stanza has n+2 lines -- except for n=13 -- and that last stanza has n+4 lines.
     Thanks, Jane Shore, for playing with numbers!
     Readers -- here is stanza 4.
       
          Who knows four. I know four.
          What were you doing on all fours?
          Three’s the hearts in a ménage à trois.
          Two’s the jump ropes in double Dutch.
          One is God for God is One—
          One good turn deserves another.

Here is a link to the rest of Shore's poem.