Abstinence

Abstinence is the term used to refer to the practice of never having sexual intercourse outside of marriage. Abstinence is deeply associated with conservative religions, and as such does not support the use of birth control, i.e. condoms. People who practice abstinence are known as being "abstinent".

Abstinence is similar, though not the same as celibacy, which refers to the practice of never having sex at all, regardless of marital status.

"Abstinence" means "to abstain", i.e. "refrain from", and as such can refer to alcohol, drugs and other human vices. However, unless specified it is normally applied to being abtinent from sex.

Politics
People on the left and  right of the  political spectrum frequently argue as to how children in school should be taught on matters of sex.

Fundamentalist conservatives generally believe that students should not be educated properly about birth control in school and instead told that that thing in their trousers will kill an angel if it's used before you're married. Students are told this instead of informing them of birth control methods, which allows them to choose their own lifestyle instead.

Liberals generally believe that students should be educated properly about birth control, and how it does and doesn't always work (because we don't pretend that jonny's are 100% bulletproof). This way, students can make a choice for themselves, rather than having their parents beliefs forced upon them.

Geography
In most of Europe students are informed properly of birth control methods, as it is a progressive part of the world. In England students learn more about contraception than American students do and teen pregnancy rates are lower than in the United States. There are more teen pregnancies in Britain than in most of Europe because Britain is more like the United States. There will always be a few really bad cases. Kids like Alfie Patten know how to use their pricks before they know how to use their brains.