I think the pollen count is a difficult job. Especially if you have hay fever.
Pollen Count Difficulties
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Explain Bear
Okay, so like, the dude is saying that "pollen count" sounds like a job where you count pollen. But, like, if you have hay fever, which is an allergy to pollen, it would be, like, super hard and annoying to do that job. So, like, the joke is that you are too dumb to realize that it's not about counting pollen.