A romantic take on relativity of simultaneity by my student in PHYS 101, Einstein’s Century, a modern physics course for non-science majors.

You and I and our perspective frames
are resting relative to one another.
So, how is it that we disagree?
I say, “We fell in love the day we met.”
You say, “It was much later.” But I know
what I observed; the forehead kisses, and
flushed cheeks, all of the more primitive signs,
pointed to us in love at the same time.
Maybe we were never quite in sync.
At times when you appeared to pull away
I, too, was moving, relative to you,
and moving fast. So though we are at rest
today, in our not­-quite­-so­-distant past
simultaneity was an illusion.

Celina Reynes,  Wellesley College ’16