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|DOI=
|accessdate=2022-10-07
}}</ref> The preputial sac may also receive [[pre-ejaculate]]. The authors further reported that the wetness is rich in lytic material.<ref name="parkash1982" /> Lytic material causes lysis or a breakdown of pathogen cell walls.<ref>{{REFweb
|url=https://medical-dictionary.thefreedictionary.com/lytic
|title=Lytic
|date=2012
|accessdate=2022-10-07
}}</ref> Moistness also may be maintained by [[transudation]].<ref name="cold-taylor1999" /> The preputial sac may also receive [[pre-ejaculate]]vary from moist to wet.
A longer prepuce helps to keep out contaminants and pathogens. Lakshmanan & Parkash (1980) described the muscle fibers in the [[prepuce]] (known as the [[dartos]]), which contract to keep the prepuce snugly close to the [[glans penis]].<ref>{{REFjournal