A rat at the pet store than I was checking out among other rats was on my chest and shoulder then climbed and played and brushed my hair.What did that mean?

That you should bathe more often.

That the rat is incredibly cute and should immeadiately be taken home with you. :)
Rats are social groomers. They groom each other, but enjoy grooming their humans too. Some rats have a fascination with hair and love to groom it, or, even funnier, steal it. Mine tug it through the cage bars and try to take it off to their nests. :) Rats just adore long hair.
He sounds like such a cutie. Do you think you'll get him?

Rat lover
Owner of four naughty little rat boys :)