Even I'm Confused

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I got a lot of questions about the beer cartoon, primarily because it is rather opaque and not particularly well done. Some people tried to make it a complete sentence – "I bean my mug" – others were unsure what it was in the first place – "I (rock? bean?) my coffee."

It doesn't make a sentence, it's just that I replaced the usual heart with a kidney to refer to how quickly beer goes through you. I know, it doesn't really make much sense. I ma...