why try?

i just heard this comment today.
"In life, we must try everything to see what it feels like."
this sentence can be held true and false in many many cases....but in this case it was related to trying cigarettes, certain more common drugs etc.
when i heard it, i got so turned off. my mind is straight away "WTF??"
but then, how do you try to convince someone out of it?
"try once only, just wanna try!...it won't kill you. it's not like i'd get addicted."
so what? so what? so what?
having studied science these years, it's hard to believe that after knowing all the facts, anyone would even want to fill their body with such filth. it's your body! respect the damn thing...it's you!!
think about the extent you will be true to the first statement. it's not applicable out of a certain un-settable limit, and is so unstable. will you try cutting yourself? will you try eating shit? will you? try only wat. won't die right? rite...............................................
anyway, enough said. my philosophy in the end is "let them learn by falling"....hopefully not too late by then.
as for me, the body is something very important. sacred and a creation of God. Imagine you got a car. brand new. you treat it better than your wife right? well, my body is like my 'car' to drive in while in this mortal world. my soul, which is the essential 'me', is the driver! so that's why i love it. so you better love yours too.