The customer, Marty Lawrence, threw the first fish pun.
Marty describes himself as a 'proud punslinger' in his Twitter bio, so another pun was only to be expected.
But who knew that Sainsbury's would take to fish punning like a fish to, well, you know?
Or that the puns would keep coming?
This isn't the first brand/customer pun summit to hit Twitter, and some people assumed it was a PR stunt. Marty denies it, but we've yet to hear from 'David'.
Presumably because he's busy learning that porpoises aren't actually fish.
The whole exchange reads like a modern-day version of Brief Encounter.
If Brief Encounter was reimagined as a burgeoning fish pun-based internet consumer bromance.
So well done, Marty and 'David'.
Consider this diem well and truly carped.
Can it with the fish puns now, though, yeah?