There cannot be any language without words. You cannot draw a picture without a canvas or a wall. You cannot write anything without paper. Even so, you cannot have health and spiritual life without celibacy.
An established celibate will not feel any difference in touching the opposite sex, a piece of paper, a block of wood, or a piece of stone. A true celibate only can cultivate Bhakti (devotion). A true celibate only can practice Yoga. A true celibate only can acquire jnana (wisdom).
Brahmacharya is meant both for men and women. Bhishma, Hanuman, Lakshmana, Jesus, Mirabai, Sulabha and Gargi were all celibates.