Curiosity killed the cat

This pic is stolen from here

Hey.

I am full..........................of questions for you.

This.

That.

Those.

These.

His.

Her.

They.

Them.

.................but I asked nothing.

You said no words.

Yet I spotted footprints, somehow.

So be careful.

I know what you think I don't know.

I don't know what you think I know.

I know what you don't know.

I don't know what you know.

I know what we both know.

We know what we know.

We don't know what we don't know.

But I will know anything that I don't know and you think I don't know and you don't know.

You know that, don't you? 

Or you don't know? 

Well now you know!

Do I have to be careful too?