Face palm.

When YouB add the prefix un to a word, it becomes negative.
Like undead?
Well yes, but generally YouB cannot add un to nouns.
Don’t tell MeB what IB can and can’t do.
IA didn’t mean YouB specifically.
YouA meant MeB generally?
IA just meant PeopleC cannot add un as a prefix to nouns normally.
I’mB sorry, IB simply derstand.
YouB mean YouB don't understand?
IB ununderstand.
What YouB do is give MeA the shits!
That's something IB seem unable to ungive I'mB afraid. This is all rather new and unobvious to me YouA see.

Later

The tip of YourB nose bridge is rather swollen.
Come now YouA are being confusing. Bridges do not consist of body parts!
IA meant the end of YourB nose.
MyB nose bridge?! MyB nose is not so large?! IB ought to punch YouA in your neck building.

Later

Do YouB think YouB like HerD more than MeA?
IB don't like YouA at all!
No, no. IA rather mean, is YourB liking of HerD more than MyA liking of HerD?
There undoes seem to be anything rather mean about YourA question.

Later

Piss off.
Now that I understand.