There is very limited research into the experience of atrophy, we know it can happen but we don’t know why it happens to some men and not others, and what the prevalence is.
Atrophy as a risk factor for increased HIV or STI risk is also unknown, however, the thinning, drying or otherwise degrading of tissue (such as through genital atrophy) makes the path of HIV into the bloodstream and the transfer of (STI) bacteria onto the mucosa much easier.
There are a number of safe sex and risk reduction strategies that can be used if condoms aren’t used such as Pre Exposure Prophylaxis (PrEP), Treatment as Prevention (TAsP) and Post Exposure Prophylaxis (PEP) for preventing HIV transmission, regular testing is also important to identify and treat STIs. Lube is also 100% your friend in terms of not exacerbating any tears associated with atrophy.
You can read all about this on GRUNT here.
Another great website is Know The Risk, it is very cis male centric but is does provide good tips on reducing risk as well as a risk calculator.
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