I don't approach anyone I can identify from a distance as being unnatural.
Highlights, wigs, weaves, dyes, bleaching, contacts, piercings, tatoos, makeup, etc etc
Those are signs of other risk factors like smoking, drinking, drugs, stds, children, etc.
I have never encountered a straightedge plain girl with all natural hair, eyes, and skin that has an std of any sort.
STDS are contracted via poor decesion making... so once you eliminate at risk persons (ppl that don't care about their body) you have a plethra of pristine women to freely indulge.
Hair is a big warning sign.
And even if she meets all other requirements if she has an asymetric haircut I know she is a hipster with a bytch attitude... so I might avoid her anyway.