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First, I need to make sure it's accurate. Human Endogenous Retroviruses are indeed part of our genome that originated from ancient viral infections. But how to present that humorously without being misleading? Maybe compare them to something relatable but unexpected, like a boomerang or hidden messages in emails. That could highlight their dormant nature and persistence. Then the edgy example sentence. The user might be looking for shock value or dark humor related to retroviruses' role in diseases. I remember that some HERV proteins have been linked to autoimmune disorders and even cancer metastasis. Using "Herpes" instead of "H" could play on both the retrovirus aspect and a common myth, making it edgy by suggesting they're not just leftovers but actively causing harm. Wait, does the user have an interest in virology or just enjoy creative explanations? They might be someone who appreciates blending science with humor. The example sentence should be unsettling enough to grab attention but still based on real facts. Maybe referencing specific diseases like MS or cancer metastasis adds credibility while keeping it edgy. Also, checking if there's any chance of confusion between HERV and actual herpes viruses.