Proper way to smoke a cigarette?

I was smoking a Djarum Black clove the other day and my friend said "dude you know you're not supposed to inhale, right?"

He said something about cloves being bad for you, fiberglass, and destruction of the lungs, and that you're only supposed to breathe it into your mouth.

Now, I'm not a crazy smoker, but I'm also no newbie. My inhalation method is as follows:

With cigarette in mouth, don't make a full seal over the filter end, but inhale as if taking a regular breath of air. Since there isn't a full seal, the cigarette smoke gets mixed in with regular air (thus thinning out the overall smoke) and inhale it into the lungs - then exhale.

But this kid was ranting about how you're only supposed to get it into the mouth, blah blah. But doesn't that defeat the purpose of smoking?

After doing a few Google searches there seem to be mixed ways on how you smoke. Some people say "DON'T LET IT GET IN YOUR LUNGS" others say the direct opposite.

For the past 20 or so years of my life, I was always under the impression that smoke goes in your lungs. Am I missing something here?

I feel stupid asking this, but honestly, I am now thoroughly confused.

ps. On a side note, do any other clove smokers here get a bit light-headed and relaxed after smoking a clove?

Jam it back in, in the dark.