I suspect that's because you've probably taken the time to actually learn from the resources that are out there. There are some young guys out there who aren't afraid to take books out of the library and learn about how to please their partners. A good idea, btw, to anyone who hasn't done this yet.
OV, I think you're barking up the wrong tree about young women & sexual experience, BTW. Instead of berating them, why don't you try to sell them on the idea of developing good longterm relationship skills? Get them to invest in the benefits of a strong, stable relationship for 20 years or so? Then, once the kids are grown (or someone dies, or whatever) the woman can then go & sow her wild oats.
I know its a reversal of the norm, but whyever not? At that age (40s, 50s) a mature woman need not remarry or even get that heavily invested in an LTR. If she worked hard earlier, she'd be wealthy, intelligent, experienced, educated... why should she need ANOTHER permanent partner to feel self-fulfilled? But she couldn't be considered a 'useless whore' by any means, could she, having already invested a couple decades in a career, husband, raising children, etc.
Just an alternative viewpoint to think about.