Wisdom is earned the hard way; it's not innate. Most kids are still foolish at age 20, especially those whose hormones are running rampant and those who've lived safe lives and haven't had the opportunity to earn that wisdom.
Duke's Ivy League swingingness wasn't broken a beat it seems. They still had that in the last few days -- at least there's been a mention of it on thread -- "Senior Pub Crawl". Lesson ain't a'learned, so to speak.