It's an amusing metaphor for the issue of teen sex. It's that tightrope we all walk between wanting to be realistic and not wanting to alienate our children. Basically, we don't want them to have sex as a form of rebellion.
That is a good goal. Humans have been known to make many a poor decision based upon rebellion.
While I am tempted to walk a parallel journey, having read the same studies he has read about the enlightened Netherlands and their low rate of teen pregnancies, I worry that this parenting mindset cannot work in America (I'm not really sure how it works in the Netherlands). It assumes that as long as a teenager uses the proper protection, they are safe from any of the consequences of teen sex.
They are not.
First of all, birth control is never 100% effective. It is even less effective when used by novices, particularly novices with raging hormones. According to avert.org, a website aiming to educate teens regarding HIV and AIDS,
If they're used correctly, condoms are about 94% - 97% (depending on which study you look at) effective at preventing pregnancy and they're nearly 100% effective at preventing transmission of HIV.
Some people say that certain viruses can 'pass through' latex - that's not true. They won't help against crabs, though, and some sexually transmitted infections (like herpes) can be caught through oral sex with someone who is infected, so you need to use condoms for this, too.The key here, of course, is that they must be used correctly. And even then they are not 100% effective. How many tasks involving hygiene can you claim your teenager actually does with 100% accuracy? Brushing their teeth? Keeping their hair clean? This isn't a bash on teenagers. It's a dose of reality: teenagers cut corners because they are usually in a hurry to move onto the more fun activity. No matter how many times you teach a teenager to use a condom properly, there is a good chance they will want to move onto the more fun activity in the heat of the moment.