It is possible for both partners to test negative for sexually transmitted diseases (STDs) at the time of testing, but it is not a guarantee that neither partner has ever been exposed to an STD. Some STDs may not show up on tests immediately after exposure, and it is also possible for someone to have an STD without experiencing any symptoms.
In addition, if either partner has engaged in sexual activity with someone else since their last STD test, they may have been exposed to an STD and could potentially transmit it to their current partner. Therefore, it is important for both partners to get tested regularly and to practice safe sex by using condoms or other forms of protection to reduce the risk of transmission.
