Sexually Transmitted Infections (STIs) Sexually transmitted infections (STIs) are infections that are passed from one person to another through sexual contact. They are usually spread during vaginal, oral, or anal sex . But sometimes they can spread through other sexual contact involving the penis, vagina, mouth, or anus. This is because some STDs, like herpes and HPV, are spread by skin-to-skin contact (Source). Learn more about STIs on the CDC website Free condoms available through Vivent Health Order Here Free condoms, lubricants and HIV test kits available to residents of Wisconsin. They will ship them directly to your door. Correct and consistent use of the male latex condom is highly effective in reducing STI transmission. Use a condom every time you have anal, vaginal, or oral sex to help prevent STIs.