If both you and your partner tested negative on rapid HIV antibody tests before sexual activity, you may wonder if unprotected sex is completely safe.

The answer is: there is still a small possible risk, because no test can detect HIV during the window period—the time shortly after infection when the virus is present but not yet detectable by tests.

Low risk does not mean zero risk. Protection is always recommended.

But if both partners have waited long enough to fully pass the window period and both test results are negative, you can be confident that HIV is not present.

To put it simply:

Friction cannot create HIV. The virus only comes from an already infected person.