What is a reason the vagina membranes are very acidic ?

Explanation:

The vagina is highly acidic. This low pH comes from the microbes that live in female genitalia. On the mucous membranes, those are primarily lactic acid bacteria (from the genus Lactobacillus). These bacteria produce lactic acid, just as they do when they turn milk into yoghurt.

exposure to hazardous carcinogens and toxic substances can cause breathing problems, such as copd and various types of cancer. it also increases the risk of heart attacks and strokes and has serious (but no less unattractive) side effects, such as aging, yellow teeth, a terrible smell and damage to the vocal cords.