i got my first Yorkie at 16, and she use to do it, run all around the house, just going mad, rubbing her head along the floor, and dragging her body

I was like omg what is she doing!!!

But this was the norm for her...
I would rub her with the towel, and as soon as she got free, she would just crazy....
I think that it is common, cause my sisters little boy use to do it 2...
My little boy does it now, but my little girl does not bother, she just hides from me when she gets out the bath, she thinks that she has got to go back in...but i think its norma.....