This is what I hate most about smokers in general. You're all so blind to the effects it's bringing upon your body. There's no such thing as reasonable smoking or 'safe' smoking, one cigarette will harm you, just like ten would.
Social smoking may or may not be the start of a slippery slope, it's impossible to tell and you're deluding yourself not to consider the possibility.
Smoking while young is no better than smoking when you're old, your lungs should be fully grown at 17-18 anyway so it won't make a blind bit of difference, apart from the number of years you'll spend smoking.
While you may feel it's not a physical addiction, it may have become one without you realising. Try not smoking for three days and see how addicted you are after that.
There is nothing "cool" about it. I cannot begin to describe the stupidity and irrationality of this argument. Do you really need to define yourself by inhaling harmful chemicals?
I apologise if I've insulted anyone in this post, but this is a subject which really annoys me. Everyone is, of course, welcome to wander off and kill themselves 20 sticks at a time, but at least try and see some sense in it all.