Asymptomatic means no signs, no symptoms, but very contagious. It may be weeks, months or even years before a person realizes they have an STD, but in the meantime, they could be spreading the disease to others and not even know it. Teenage girls are more susceptible to STDs than anyone else because their immune systems and reproductive systems are not fully developed. When you have sex with a person, you are in essence having sex with everyone they have had sex with. If they got an STD from a prior sexual partner, then you could become infected too.
Abstinence means freedom from STDs.
Contrary to what you may have heard, most teens are not having sex. Government studies have shown that sexual activity among teenagers is going down for the first time in 25 years. But of the teenagers who choose not to abstain, one in four gets an STD every year. The following is a list of several of the most common STDs, however, there are more than 25 significant STDs. It may cause pain or be asymptomatic.