Protecting My Vagina
My vagina protects itself from various things. It has populations of friendly microorganisms that prevent other bugs from growing in it. It is acidic to kill things. It is hidden inside me in a covert location. The cervix makes protective mucus to keep things out of my uterus. I also protect my vagina in various conscious ways. I don't consider underwear one of them, as I don't think a flimsy layer of cloth keeps much out. I sort of protect my vagina from various diseases by getting periodic preventative checkups at the doctor. Mainly I have protected my vagina from being infected, and protected myself from becoming impregnated through my vagina.