Nicely done
Excellent fluid animation, hypnotic quality, and cute character. Sure it's short, but the trade-off for quality not length, I thought, was well worth it. The animation loops seamlessly as well, so major plus.
Only downsides I can see are first: her right hand looks distorted when it moves down the side of her breast and her fingers pointing at the "camera". Looked like a perspective issue, which is always tough to do (at least for me). Second: Her right breast looked like it shrunk for a moment when her left hand passed over it. Actually, looking at it again, it might've been the way her right arm was pressed against it at the moment, thus making me think that. (Just in case, I meant HER left and right. So...yeah.)
Overall, good job. If you are going to make more of these experimental loops, I don't know, her in a run cycle or something, I hope to see the same level of quality.