Myth: Only people with lots of sex partners get an STD.

Fact: You can get an STD from just one partner if he or she has an STD. You can get an STD the first time you have sex if your partner has an STD. The younger you are, the more vulnerable your body is to an STD. If you have several partners, the chances increase that you’ll be with someone who has an STD because it is common.