Great point. Another subtle aspect to this kind of rhetoric is that it's about an issue so pervasive that it's disingenuous to present this as new information. Even as a boy you have to be careful what you say to girls, and vice versa. The rules are slightly different, but there are still gender lines and it's going to be really (really really) hard to change that! Men and women are all aware of this, so presenting this as new information is a bit divisive, despite the best intentions of the author.