Brahmacharya is not against sex. If it is against sex then sex can never disappear. Brahmacharya is a transmutation of the energy: it is not being against sex, rather it is changing the whole energy from the sex center to the higher centers. When it reaches to the seventh center of man, the sahasrar, then brahmacharya happens. If it remains in the first center, muladhar, then sex; when it reaches to the seventh center, then samadhi. The same energy moves. It is not being against it; rather, it is an art how to use it.