A nurse is reinforcing education with a client who is sexually active about sexually transmitted infections (STIs). Which of the following statements by the client indicates an understanding of the instruction?

Sexually transmitted infections (STIs) are infections transmitted primarily through sexual contact, including vaginal, oral, and anal intercourse. Prevention education focuses on reducing risk through safe sexual practices such as consistent condom use, limiting number of partners, and regular screening. While no method except abstinence is 100% protective, barrier methods significantly reduce transmission risk. Client understanding is demonstrated when statements reflect accurate knowledge of risk reduction rather than absolute prevention myths. Rationale: A. “I can’t get an STI because I only have one partner.” This reflects a misunderstanding because STI transmission is not eliminated by having a single partner. Risk depends on the partner’s sexual history and infection status, which may be unknown or undisclosed. This statement demonstrates false reassurance and lack of understanding of STI transmission dynamics. B. “Sharing sex toys does not increase my risk of getting an STI.” This is incorrect because STI pathogens can be transmitted through contaminated bodily fluids on shared sexual devices. Without proper cleaning or use of barriers such as condoms on toys, infections like gonorrhea, chlamydia, or HPV can be spread. This statement shows a lack of awareness of indirect transmission routes. C. “I can’t get an STI when engaging in oral sex.” This is incorrect because oral sex can transmit infections such as herpes simplex virus, gonorrhea, syphilis, and HPV. Mucous membrane contact allows pathogen transmission even without penetrative intercourse. This statement indicates misunderstanding of STI transmission routes and associated risks. D. “My risk of getting an STI is lower because I always use condoms.” This demonstrates correct understanding of risk reduction. Consistent and correct use of condoms significantly decreases transmission of many STIs by providing a physical barrier against infectious secretions. While not completely eliminating risk, condoms are evidence-based preventive measure in sexual health education.