Question: how do you get chlamydia if you only have one partner?
Answer: How is chlamydia spread? You can get chlamydia by having vaginal, anal, or oral sex with someone who has chlamydia. If your sex partner is male you can still get chlamydia even if he does not ejaculate (cum). If you've had chlamydia and were treated in the past, you can still get infected again.