Was it hard?
Was it hard to Tween a bunch of loops like that?
Seriously though I'm sure copious amounts of time and effort went into the FBF of the loops and colouring. Which turned out very smooth. I'm just not a fan TBH.
It doesn't gross me out at all (if it's meant to..). Maybe I'm just used to seeing the other animations like this and am growing tiresome of them.