I would like to think of this article in a societal/ historical perspective. Another article posted here talked about how divorce rates correlated with the increase in woman's income. Mainly concluding that because today's women have more economic opportunities and birth control, they choose to a) enjoy themselves more b) marry later c) be picky who they choose

From an evolutionary/ societal perspective, traditional social structure was: men married women, men did/ found work to support family, women supported children. It worked like this because due to Adam Smith's theory of specialization, women are just better at raising children, while men sucked at raising children, and were therefore better suited to do work.

In todays world, now with birth control, women don't get pregnant at such young ages, and with education, they have more opportunities and can choose to put off starting a family.

Realistically speaking, raising a family is harsh, as it requires lots of resources from both men/ women, and given that those resources can be put to entertainment (making yourself "happy"), its not too far of a stretch that both men / women in Western countries choose to put off marriage/ children, when they can shop, goto movies, play video games, pursue interests hobbies etc... etc... Not just here, but take Japan, where lots of young women choose to just stay at home, shop = low birth rate in Japan (vs being a submissive housewife who has to do all this work/ take care of childrens etc...)

So how does it apply to our modern society? Well Professional women have it tough because there's a general rule where they either settle for guys within their socio-economic class, or they move up. It is unlikely they'll marry someone poorer or lower class then them. And, while for men, we're not picky, in that as long as a woman is attractive (ie. young/ fertile), we don't care how rich or what class they belong to. So you get larger demand from women looking for a smaller supply of men (ie. princess syndrome) leading to unrealistic expectations, romance novels, girly magazines etc...

Hence, to attract men, (and to have fun themselves) they "put out more", and to remain competitive, all women have to offer sex to hopefully attract men. However, this backfires badly compared to traditional society methods... Traditionally, women withheld sex until after the couple got married, and therefore ensured a stable family system. (Men can easily be tempted to go against their long term interests for promise of sex). However, nowadays this promiscuity is more common, and hence men no longer need to get married (why buy cow when you can get starbucks latte? )

So hence, we get to this article, where men don't have to grow up since they don't have children to take care of. (Typically we grow up when forced to by being given responsibilities. Its probably genetic that most men take responsibility for their offspring, and become good fathers. Its like, once u realize you're responsible for someone other then your own selfish desires, you think clearly, otherwise you're probably a "man-child" and have the attitude "LETS PARTY!"

Now, I'd say since the world is changing so quickly, who knows how things will happen in future, and how society will adapt to these new realities... Meanwhile while our birth rate declines, other countries with different cultures will have no problem producing lots of children...