Brilliant. So we can look forward to higher incidence of teenage pregnancy and STDs, because teenagers are going to experiment no matter how many of them are invited to "condemn" masturbation or premarital sex, as these laughable talks and workbooks are apparently having them do, and they they are going to experiment at the risk of their own health because they have been denied factual information about how the body or the condom works.

How does anyone stop this? If I were a parent, I would write to my child's school, point out the factual inaccuracies and foolishness involved, and, if nothing else, insist that my child be excused from attending it. And yes, my kid would get actual sex education at home (as opposed to the sexuality "education" developed by the Ministry of Education). But then, I don't know how many parents in Singapore would do that --- or we wouldn't need sexuality education in schools in the first place.