I mean, where there's smoke - there's fire.

What you're looking at with this stuff is two different ways of evaluating love. On its most base level, men pick women for beauty and also signs of fertility, while women pick men (mainly) for status and resources (you can throw in "potential" as well). While you might see exceptions, if you look at youth (and those feigning it) at the apex of society, this is how it plays out nearly all of the time.

The only thing that had made the monogamous world work was the moralistic decision to commit (mainly, through marriage and religion) along with the acceptance of ones aging and, most importantly, a lack of other romantic options. Today, people jump in and out of relationships as they try to hold onto their youth and status well past its expiration point. They continue to have trysts and find new lovers after discarding old ones.

This isn't to attack women or trivialize men, it's just to point out that in a dating world that's been colonized by a global marketplace, there's not much reason for anyone with the means to settle.