Totally illimeric here

There was a young couple from Derry
Who made love in a car on a ferry.
They kissed and caressed
Till, politically harassed,
They were asked to get off on a jerry.

But how could they reach some dry land;
Ideally a shore with deep sand?
Or it could be a port
Or sherry if caught.
for their pot might capsize or upend.

I really believe it’s immoral
to put young folk’s lives in such peril
Why, they could row round and round
On this vessel unsound.
And sink down till their eyes turn to coral

Jerry is a name for a chamber pot.You can still buy them!