We are not a culture that appreciates modesty so anything like that seems extra foreign.
i know this well my friend but you have to know that here in arab countries too there are a lot of girls who dont wear hijab and wear very open and tight clothes.. also a lot of those who wear hijab wear at the same time very tight clothes.. those who wear "true hijab" are small percentage!!..
of course non of the egyptian christian girls cover their hair and most of them wear open clothes (a lot of muslim girls too wear open/tight clothes).. when my wife was still a student one of her christian colleagues told her that he was attracted to muslim girls who wear true hijab the most!!..