Is smoking injurious?

You asked me why do you smoke

I've told you there's no reason

What if I tell you, I lied

Firstly wanted to question myself, 

why did I hide? 

I didn't even realise 

I started smoking daily, came to know from your wise

Smoking is injurious to health 

Will you be an firstaid for myself? 

I'm okay with not smoking

Want one valid reason, I ain't joking!!

Don't you give me reason"smoking is injurious to health" 

I myself you yourself everything is injurious that's a 'stealth'