Teens have changed because parents have changed. We have one parent who wants her daughter to wait three months before having sex. It used to be that parents controlled their kids and shotgun weddings were the norm when daughters had sex with a boyfriend. Times have really changed. One thing has not changed. Decent boys still are not interested in sluts.
And smart boys are not interested in sluts. The trouble is, they are having to search farther and wider to find girls who aren't. The girls have devalued themselves enormously.