In order to prevent the mingling of the sexes and preserve ethical boundaries, Islam has obligated women to observe modest dressing (hijab). Hijab is a means of providing security: by observing hijab, Muslim women provide security both for themselves and for Muslim men. Wherever hijab is taken away from women, wherever they push women towards bareness and nudity, security is taken away primarily from women and secondarily from men and the youth. To preserve a healthy and secure environment wherein women can pursue their tasks and men can carry out their responsibilities, Islam has set hijab as an obligation: hijab is an outstanding obligation by Islam and its advantages are as I described.