Wilhelm Reich commented that sex education of his time was a work of deception, focusing on biology while concealing excitement-arousal, which is what a pubescent individual is mostly interested in. Reich added that this emphasis obscures what he believed to be a basic psychological principle: that all worries and difficulties originate from unsatisfied sexual impulses. Leepson asserted that the majority of people favor some sort of sex instruction in public schools, and this has become an intensely controversial issue because, unlike most subjects, sex education is concerned with an especially sensitive and highly personal part of human life. He suggested that sex education should be taught in the classroom.