You are at risk for all STDs that she might have.
Even if a low risk.
There is no way to reduce that risk other than use a condom, etc.
Obviously, if you are wanting to perform oral sex and drink urine, you would not be using a condom or other barrier, so there would be no way to reduce the risk, other than going on drug prevention treatment for HIV.
Of course, if you have a steady partner, you are monogomous, and you have both been tested clean, then this would eliminate the risk.
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