MYTH! Depending on how your partner defines being a virgin, it is possible for them to have contracted an STI. Your partner might not have had vaginal sex, but may have had oral sex with someone (and still consider themselves a virgin), putting themselves at risk for an STI. Also, there are other STIs (herpes and HPV) that are passed through skin-to-skin contact, even if no penetration has taken place. It is important to discuss with your partner all sexual activity they have participated in and to always practice safer sex.