If neither of you has had any kind of sex, then it's unlikely. But the tricky part is defining "virgin."

Sexually transmitted diseases (STDs) can spread through oral, vaginal, and anal sex. They can also be passed through certain types of sexual skin-to-skin touching like when you rub bodies with no clothes on. So, when you and your partner use the word "virgin," make sure you both mean the same thing. There is very little risk for STDs if neither has had any sexual experience at all.

But sex isn't the only factor. STDs can spread when people share needles. They can be passed from mother to newborn baby. So even if a person has had no sexual experiences they could have an STD from using needles or from their mother if she was infected and passed it on through her breast milk.

Even if neither of you has had any kind of sex play or any other risk factor, you should still use condoms if you decide to have sex. If you are in a heterosexual relationship, then condoms are doing "double duty!" Condoms protect against both pregnancy and infection.

Another factor is that no matter how much you two trust each other, people sometimes cheat. Sad, but true. Condoms protect against that chance.

You should also use condoms if you decide to have oral sex. Flavored condoms are available in most drugstores. Females should use the Sheer Glyde Dam or cut open flavored condoms to cover their vulva.

For more information on STDs check out these Sex, Etc. stories.

Got a question about STDs? Call the CDC's national hotline at 1-800-227-8922, open 24/7.