| http://www.w3.org/ns/prov#value | - How to Reduce the STD Risks of Anal PenetrationUnprotected anal sex, regardless of whether it is practiced by straight or gay couples, is considered the riskiest activity for sexually transmitted diseases because of the physical design of the anus: It is narrow, it does not self-lubricate, and the skin is more fragile and likely to tear, allowing STDs such as HIV and hepatitis easy passage into t
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