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|format=
|quote=
}}</ref> Urine is not considered to be a sterile liquid.<ref>{{REFnews |title=Urine is not sterile, and neither is the rest of you |url=https://www.sciencenews.org/blog/gory-details/urine-not-sterile-and-neither-rest-you |last=Engelhaupt |first=Erxka |init= |author-link= |last2= |init2= |author2-link= |publisher=ScienceNews |date=2014-05-22 |accessdate=2024-04-04 |format= |quote=}}</ref>
Urine may be used to flush out the [[preputial sac]] when the [[foreskin]] does not retract.