Our Peter Pan adolescent-idolatrous culture is [at least in theory] just fine for boys [as long as they don't lose their sperm counts], but it's death for girls.
My advice for twenty-ish girls would be to marry up by ten or fifteen years: Look for a guy in his late 30s or early 40s who is emotionally mature and financially capable of supporting you.
Don't waste your fertile years on some pimply-faced twit who doesn't give a damn about you and who will drop you like a hot potato when the going gets tough.
Find a real man who is ready and willing to give you babies.
ping to #13
Ding, ding, ding! We have a winner! Great post!