As a veteran hobbyist, I'm willing to pay top dollar to get exactly what I want and so it doesn't bother me in the least that some women are cheap and easy. It's a challenge in itself to seek the one you want and offer $300, $400 or $1000 for a quality fuck, but then you're guaranteed that the lady has a very small, exclusive circle of lovers and your chances to "be the last man standing" ironically increases.
Second, time is a great equalizer. A woman blossoms over a very short period of time, say from age 18-29. She may have experienced a handful of lovers, but the day will come when her sexuality diminishes in the eyes of her potential suitors. Her pool of competition increases with age. All else being equal, and outside a committed relationship/marriage, most men will substitute an older woman with a younger one - that's a no brainer.
Today's generation of young men have smartened up. Woman really ought to direct their outrage at other women and to themselves (and to religion) for playing dumb economic games.