Canary in the Coal Mine

So, this from SMBC

This makes me think that “canary in the coal mine” must be slang for some sort of deviant sex act. However, thirty seconds on google did not reveal anything.

I’ll open the floor to suggestions.

One thought on “Canary in the Coal Mine”

  1. I thought perhaps it connected the word “movement” to sexually restrictive cults, as their social dynamics evolve over time? But who knows what the kids these days are into…

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