Why do we Have Earwax?

No Judging: At one point you've probably put a finger in your ear and dug out some rather unsightly ear wax, but why does your body produce this yellowy substance in the first place?

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Sources:

https://www.britannica.com/demystifie...
http://www.nature.com/ng/journal/v38/...
https://medlineplus.gov/ency/article/...

https://academic.oup.com/qjmed/articl...
http://commonhealth.legacy.wbur.org/2...
http://www.entnet.org/content/earwax-...
https://www.ncbi.nlm.nih.gov/pubmed/1...
http://onlinelibrary.wiley.com/doi/10...
http://europepmc.org/abstract/med/187...