Nut-nut is not a term of endearment

I read in 8 Days that Fann Wong calls Christopher Lee "爱爱" in private as a term of endearment.

As if struck by a bolt of inspiration, I turned to Fadz one evening and starting calling him "love-love" in my most manja of voices.

And of course, being Fadz, he gave me his patented "what the bleagh!" look.

Annoyed, I told him to christen a term of endearment for me too.

After a short pause, guess what the brilliant man comes up with?

NUT NUT.

So pleased with himself, he called me nut-nut nonstop for the next 5 minutes.

Why, someone please tell me, why I'm in love with a sadist?