The customer, Marty Lawrence, threw the first fish pun. 'David' at Sainsbury's gamely replied. 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? And 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. Tap to play or pause GIF Tap to play or pause GIF gifatron.com Starring Ethan Hawke as Marty, and Julie Delpy as all of Sainsbury's 500+ UK stores. So well done, Marty and 'David'. Consider this diem well and truly carped. youtube.com Can it with the fish puns now, though, yeah? Tap to play or pause GIF Tap to play or pause GIF Can it like tuna.