Wer ist der Typ? [English translation]

I know, when the news program begins

I know, how much 5 times 7 is

I always know, how late it is

I know, Karl Marx was a communist

I know, who elects the Federal Chancellor

I know, every time, what he orders

I know, bananas make me sick

I know, my granny's always right

But I don't know

Who's the guy beside you

Who's the guy & what does he want here

...please tell me

I know, when the sun goes down

I know, what's in the sky at night

I know, in winter it's cold

I know, in a couple of years I'll be old

But I don't know: Who is the guy...

But you were so choosy

& now he's bamboozling you

you're falling for his patter

it's got to be sussed out