https://en.wikipedia.org/wiki/Lactobacillus

Lactobacillus species constitute a significant component of the human and animal microbiota at a number of body sites, such as the digestive system, and the female genital system.[4] In women of European ancestry, Lactobacillus species are normally a major part of the vaginal microbiota.[5][6] Lactobacillus forms biofilms in the vaginal and gut microbiota,[7] allowing them to persist during harsh environmental conditions and maintain ample populations.[8] Lactobacillus exhibits a mutualistic relationship with the human body, as it protects the host against potential invasions by pathogens, and in turn, the host provides a source of nutrients.[9] Lactobacilli are among the most common probiotic found in food such as yogurt, and it is diverse in its application to maintain human well-being, as it can help treat diarrhea, vaginal infections, and skin disorders such as eczema.[10]



i bet that the contraceptive pill kills it, for one thing

it's aero-tolerant, it can tolerate a lot of exposure to air for an anaerobic bacterium

it is symbiotic with acidophilus, the combination of the two is what makes yogurt

women don't exude maltose, more likely since it feeds on lactic acid the vagina emits as this is a product of muscle metabolism in low oxygen conditions

they can live off lactose, but what they really love is lactic acid and that's produced during anaerobic metabolism of glucose by muscles, and i'd guess that's where it comes from 

 Ok, I have a few thoughts about you, and lactobacillus. The organism doesn’t love lactic acid, it is a protective waste product. You are fairly intelligent, but my opinion is that you need to focus on quality over quantity. You are young and highly motivated, but take the time to acquire a handhold on the information you procure.