In the NISSO investigation, 51% of the boys wanted more detailed information about the particular sexual functions. More than 50% confessed they were strongly preoccupied with sex, and in 9% this preoccupation verged on the obsessive.
Not less than 47.7% of the 15-17-year-old males complained that they did not know a single person with whom they could really discuss sexual problems. And they did have problems! No less than 39.1% had discovered in themselves strange sexual desires and wondered how to deal with them. (p.36)
Half of the married people are unhappy with their marital situation.
12.3% of the 15-17-year-old boys claimed they were dissatisfied with their sexual experiences with girls. (p.29)
Only one boy in three said he felt no need to conceal his erections when they occurred. "Another third felt they had to hide them". (de Boer 1978, p. 54)
Only one-quarter of the parents interviewed were unopposed to their adolescent children having intercourse, and those for the most part stipulated that it should only be performed with a single partner within the context of an intimate relationship. Even then, only 18% would allow it to be done in their own homes. Fifty percent disapproved of their children masturbating. (de Regt 1982, p.57)
A girl said, "An experienced boy does it in such a way that you, too, have some pleasure. You can't trust the inexperienced: they only think about their own satisfaction, and afterwards they boast about it to everybody." (de Boer 1978, p.49)
cited by Brongersma 1990, p.223, 283, 286