No, I haven't noticed this at all. Have you? Look around at the couples you see this week at the store or the mall or walking together on the street.... I don't think this "observation" is true at all. It's a salesman's pitch, like cyborg said.....
They're selling this stuff to guys who believe following their advice will mean getting a porn star look alike. It's the same mentality behind selling ab lounges to women who are 300 lbs.
I've made no declarations on the merits of the author's arguments yet. For one thing, I could write the definitive book on it, at least from a feller's perspective.
That said a couple of his points are valid.