He was telling me this story, about how he had unprotected sex with a girl who has chlamydia. According to him, the girl had chlamydia in her mouth, and she gave him oral sex, and then they switched from oral to regular vaginal penetrative sex. (Neither him or her knew she had chlamydia until afterwards.) After she told him, he said he went to the doctor and got tested as soon as he could, and they told him his results were negative and that he didn't have chlamydia, and that he had somehow "passed it like a baton, from her mouth to her vagina" and therefore he's "clean, even though he really should have it" (his words). I'm not sure if he ever got tested again, I'm going to ask him next time I see him in person. Is this even possible though? Could he be lying about not having it just to get me to engage in sexual activities with him? Or could it be possible that even though his results supposedly came back negative, that he has it? I'm a virgin so I'm just really worried about my first sexual encounter(s) ending up in me contracting chlamydia. Thanks for any help!