It doesn’t. The difference is that all teenagers become difficult. But girls are often worse. If parents have already seen a boy go through their teenage years

It doesn’t. The difference is that all teenagers become difficult. But girls are often worse. If parents have already seen a boy go through their teenage years, they’ll be better prepared for the grief a 12-year-old girl can cause. Also, anecdotally, a close friend of mine had a very difficult older sister. The younger siblings witnessed her bad behaviour, and decided not to repeat the theatrics.