I would completely disagree. I think most young single women–college, twenty-thirty somethings do NOT view sex as a path to marriage. Quite the opposite–they have discovered that they can indulge in a very full and active sex life without any need for marriage. I think this is particularly rampant on college campuses and in the club scene in larger metropolitan areas. Past “polite society” taboos against a smorgasbord of practices like performing sexual acts in public, in groups, in front of cameras, anonymously, in association with drug use and/or homosexual experimentation have long since fallen aside. There is no fear of pregnancy, a (foolish) underappreciation for the perils of STDs and a desire to try on many options of BEFORE commiting for the long-term–somewhat akin to shoe shopping in an expensive boutique.
There are few moral limits to the general approbation for this type of promiscuity that operate to slow this experimentation down. It scares me to death for the sake of my own daughters and proves that religious communities are needed more than ever to 1) make themselves relevant to young, urban singles and 2) to educate and support the lifestyle of those who do not choose to participate in this debauchery.