Editor’s note: Jill Pertler is taking the week off for Christmas but has provided this classic column from 2015 to fill the gap.Blowing out 18 candles on your birthday cake is a huge milestone. It happens in an instant. You are an adult! As such, you can vote and get married. You can serve in the military, get a tattoo, go to a casino, donate blood and get called for jury duty. You can even win the lottery (because you are finally old enough to buy a ticket).Even though you can do all these things (and more) being 18 does ...