Schoolchildren in Britain have an alarming lack of knowledge about sex, according to a new survey.
The research, by the Health Education Authority, also found that a third of pupils aged between 14 and 16 have used cannabis.
More than a quarter of pupils in the 14-16 age group believe taking the Pill will protect them from sexually transmitted diseases, while around the same number think that having a steady partner will do so.
The survey also shows that many 15 and 16-year-olds are ignorant about a number of diseases including syphilis, gonorrhoea and chlamydia.
