Each subway platform
has two trains, see.
One east and one west,
or one south and one north.

In many cases,
you must cross a bridge or tunnel
to reach the other train.
On these bridges,
there is often a bench,
equidistant between either directions,
atop the two trains.

This is where you must sit
when you are young and in love,
and with the person
with whom you are in love and young,
for each of you
will inevitably need to go another direction,
west or east
or north or south,

but it is wonderfully easy
to just sit on the bench.