I've been smoking since I was seventeen or for about seven years now. I can tell you that I regret every fkn cigarette. If you can help it, just don't do it. There are a million reasons as to why smoking is shit and you should focus on those instead of finding a reason to justify starting.
Fun fact, I've wanted to quit smoking for a few years now, tried quitting a year ago, couldn't even handle twelve hours. I stumbled upon this thread about four weeks ago and I felt like shit.
I've now stopped smoking and haven't smoked a cigarette for 2 weeks, 4 days and 22 hours and indent on keeping it that way.