The article is more sexism against men. This quote says a lot about how the author views men and encourages women to view men:
"It's an old cliché but no less true today than when it was coined: men don't buy a cow when they're getting the milk for free. If you're having sex outside of marriage, you're diminishing your sexual power and your ability to find a good match...Men having their sexual needs met casually have fewer reasons to sign up for all the responsibilities of marriage."
Sorry, but if that is the way that a woman, Christian or otherwise, views me, then I am better off without a relationship with her. If that is the way that all women view men, then I will be better off as a lifelong solo single.
On one hand the author tells women not to manipulate. But on the other hand the author encourages women to use their "sexual power".
A woman should treat a man like the unique individual that he is. And a woman should relate to a man as the unique individual that she is. Ultimately, that is who one will go to bed with, file joint tax returns with, share child rearing duties with, etc.
If one relates to stereotypes, prejudices and other social constructs when looking for a partner then she is going to end up spending the rest of her life mostly relating to those stereotypes, prejudices and social constructs and missing out on the unique individual that she has bonded with, I would say. But maybe that is the way that a lot of people like it. I don't know.
More importantly, if one relates to stereotypes, prejudices and other social constructs when looking for a partner then she limits her choices. For example if a woman approaches men like they "need" sex and she has "sexual power" over them then she will likely build barriers that men who give sex low priority are not motivated to try to break through. Consequently, she could miss out on a lot of good potential marriage partners.