Problem: You're working in an ob/gyn office and a pregnant woman is offended that you want to administer a test for chlamydia, gonorrhea and syphilis, as recommended by the CDC and conducted on all women visiting your office. "I know I don't have any of those diseases, since the only person I've ever had sex with is my husband and he with me."
How would you explain to her why her results, even if negative, benefit the public?