Question pretext
Next, we'd like to ask you some questions about sex. We know you may be shy, but we are asking these questions to better understand the health needs of young people like you. We want to remind you that all your answers will be kept strictly confidential and no one in this community will know the answers that you give, not your parents nor anyone else.
Literal question
"I would like to ask about your 3 most recent sexual partners in the past 12 months, including your current partner if you currently have one. All the information that you give me is completely confidential, and neither your partner nor anybody else will see the information you give me." Is that OK with you?