"The exact mechanism of esophageal injury after fellatio is uncertain and no case reports have been found after extensive database search." https://journals.lww.com/ajg/Fulltext/2016/10001/Esophageal_Tear_After_Fellatio_in_a_Patient_with.1627.aspx (via
@poppyhazeRev. Poppy Haze 𓅋)
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