Meeting at Night Steaminess Rating

Exactly how steamy is this poem?

PG-13

There's no obvious sex in this poem, but there are definitely a few suggestive moments. Indeed, the moment where the boat gets stuck in the sand – you know the part about the "pushing prow" and the "slushy sand" (5-6) – seems slightly sexual, as does the intense "beating" of the "two hearts" (12) at the end. There's nothing too steamy here, but it's just enough to warrant a PG-13 rating… you know, just to warn the more zealous parents.