What are the odds -- of a kiss?

Virginia poet Bernadette Geyer has a new (2013) poetry book, The Scabbard of Her Throat -- and I have been exploring these engaging poems of family and fantasy.  And finding among them this mathy poem, "Odds":

Odds     by Bernadette Geyer

Eighty percent of all plane crashes occur in the first
three minutes or in the last minute of the flight.

The odds of winning the lottery are 1 in 18 million
but you can't win if you don't play.  In Peru,

Following Euler in Koenigsberg

     The Köenigsberg Bridges have an important link to mathematics -- for mathematician Leonhard Euler (1707-1783) took a legendary Köenigsberg puzzle-pastime as the seed for development of a new branch of mathematics, graph theory (which is now generally included under the umbrella of combinatorics).  As the story goes, Köenigsberg residents made a Sunday recreation of trying to tour their city, crossing each of its seven bridges exactly once.  This problem is perhaps particularly fascinating because of its impossibility -- a dilemma cause by the existence of odd (rather than even) numbers of bridges between the parts of this water-separated city.