 [ Symptoms ] is lupus hereditary [ Disease ] and i am glad you asked i think maybe your friend misunderstood what the doctor told her chlamydia is a very common sexually transmitted infection sti you can get chlamydia through vaginal anal or possibly even oral sex switching from anal sex to vaginal sex in one session may not make you more likely to get chlamydia however anyone who does have anal sex without a condom before vaginal sex should make sure her partner has thoroughly cleaned his penis otherwise you could transfer intestinal bacteria or other types of stis into the vagina which might not be good obviously your best bet is always to practice safe sex by having your partner use a condom it is not perfect because it will not necessarily protect you or him from stds like human papillomavirus hpv or herpes but it is better than no protection at all hope this helps