Lubrication

... possible partners. * It signals that a person has entered sexual maturityand is a valid partner. Pubic hair (and underarm hair) also functions as lubrication. Pubic hair in particular protects against the friction generated during intercourse. Under the arms and between the legs, skin on skin ...

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... cilia to increase the absorption sites and, yes, Goblet cells here and there among that epithelium. Yes, Goblet cell produces mucus to provide a lubrication due to peristaltic movement and also serves an immunity barrier because it is where IgA attached, to prevent antigens enter the body thru ...

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