I would say BV is the no.1 reason why I don't return. Sadly I have had two regs who I was perfectly satisfied with who developed it. Having multiple sexual partners is one of the reasons. Also BV facilitates other infections, so it is a health concern.
As it was getting worse each time I saw one of them I did let her know in an email. I tried to word it diplomatically, but she went berserk. Sent me several accusatory emails saying I was accusing her of having an STD.
I did some research: antibiotics are often not successful. Antibiotics + lacobacillus (orally or inserted) works better - because the vaginal flora are needed to stop the smell-causing bacteria.
Funnily enough, on one health site, a woman claimed to have cured it by inserting Vitamin C tablets into her vag! That actually makes some sense - because C is a powerful immune system stimulant, and it is also a mild acid (pure C is Ascorbic Acid) as the pH of the vag is acidic. She said there was a strange chalky discharge which went away....which I think is the fillers in the tablet. None of the people realised that maybe making a paste from pure ascorbic acid powder would likely be more effective.
Anyway, SAAFE hardly covers the subject. I did wonder why they don't realise how off-putting it is to punters.