Why So Serious?

I fell
No, I was pushed
Into humanity
I changed
No, I was forced
To be this smiling fiend
I'm pale
No, I am white
With lips are red as rose
It's sad
No, it's insane
That no one even knows
I spread
No, I infect
Anyone who breathes my air
With this
No, with that thing
That gargoyle grin I wear
I see
No, I believe
This thing will be my end
You'll join
Yes, you will join
Why so serious, my friend?