Total abstinence from sensual pleasure is called celibacy. Sensual pleasure is an infatuating force which sets aside all virtues and reason at the time of indulgence. This vow of controlling sensuality is very difficult to observe in its subtle form. One may refrain from physical indulgence but may still think of the pleasures of sensualism, which is prohibited in Jainism.
Monks are required to observe this vow strictly and completely. They should not enjoy sensual pleasures, ask others to do the same, nor approve of it. For laypersons, brahmacharya means either confining sex to marriage or complete celibacy and they are required to be chaste in their deeds and thoughts. There are several rules laid down for observing this vow for householders.