According to a WHO publication from 2006, which effect has sex education in European schools had?

Explanation

According to a WHO publication from 2006, sex education across Europe is evaluated all too rarely. Nevertheless, there is strong international documentation that school-based sex education can be effective as a means to reducing risky sexual behaviour, without leading to increased sexual activity as many have feared. On the contrary, most of those programmes evaluated have either shown a delay in the sexual debut or a decrease in the number of sexual partners. The same study show that the education increases the knowledge about sex significantly.