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It's not uncommon to do away with punctuation completely in poetry. However, in this case you aren't doing that -- you are using question marks. So yes, you need the comma.
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#3: Attribution notice added
Source: https://writers.stackexchange.com/a/9030 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/