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}}</ref> They are also present in the eye lid and perform the same function in both places. They secrete the oils necessary to keep the glans surface soft, moist, smooth, warm, sensitive, and with a healthy glistening red or purple color. This moisturizer also maintains PH balance, and optimal cleanliness. This is required to keep the surface of the glans healthy and clean via the cleaning effects of mucous secretions. Again, this function is analogous to the eye lid. The [[glans penis ]] is meant to be an internal organ covered and protected from the outside world.

In the genitally [[intact ]] [[penis ]] the [[urine]] stream flushes out the [[urethra]] and foreskin of foreign microbes. In healthy individuals, [[urine]] is sterile and has a disinfectant quality. Researchers have demonstrated that the swirling action of [[urine]] as it rushes through the foreskin flushes it out effortlessly and naturally.<ref name="parkash-jeykumar1973">{{REFjournal