[user104658]

Originally Posted by Crimson Dynamo

Its a just a joke lads, put the culture war weapons away, no points awarded in this round im afraid - thanks for playing etc

It's a bad joke that doesn't make sense. It would have been passable play on words joke (for some) if it had been

"Knock knock"

"Who's they/them?"

As it stands it just looks like someone who didn't finish school and would only be laughed at by people who are similarly illiterate