Internet sleuths have been intrigued by a clip which shows Prime Minister Theresa May and Labour leader Jeremy Corbyn sharing a conspiratorial giggle during the king of Spain's visit to parliament.
There were plenty of guesses over what - or who - had been the subject of the joke:
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Some pointed out that Corbyn may have been laughing at, rather than with, May:
Others suspected the PM may have been sharing a naughty secret with her Labour counterpart:
Might this even be a budding case of "opposites attract", wondered a few hopeful romantics:
However, the pessimists were on hand to dispel any notion that the shared chuckle might be the start of a beautiful friendship:
And the scene was all too familiar for some…