OK, so im not exactly sure about you guys but a few girls that i talk to, every time i tease them in some kind like saying 'Hey there my favourite little hobbit/smurf/elf/etc...' (neg on them being short if you didnt know

lol)
But they always repeat what i say... so ill say "Hey there you little munchkin you!"
They will repeat it under their breathe with a little giggle, quietly say to themselves "little muchkin" then giggle...
What is this? They just find my comments funny so they feel the need to say it to themselves again?