BORG: We are the Borg. Resistance is futile.
MY 5 YEAR OLD DAUGHTER: Why?
BORG: We will add your biological and technological distinctiveness to our own.
5YO: Why?
BORG: To expand the collective.
5YO: Why?
BORG: So that we may achieve perfection.
5YO: Why?
BORG: To reach the pinnacle of our evolution.
5YO: Why?
BORG: *sigh* Because it’s just something we do, ok?
5YO: Why?
BORG: … you know what? F this …*opens a transwarp conduit and leaves*

@drmaddkap
10 years later:
The Borg: Strength is irrelevant. Resistance is futile. We wish to improve ourselves. We will add your biological and technological distinctiveness to our own.
Answer: We don't want to be assimilated!
The Borg: Why?
Answer: Our society is based on equality and freedom.
The Borg: Why?
Answer: Because we came from slavery and after bloody riots. Freedom and equality allow living in peace and wealth
The Borg: Why?
...
...
Answer: Well we give up.

Sorry for bad englisch