"It's like she's covered in mud"

I was invited to join swimming lessons by one of the nurses at work. She thought it would be fun to have the kids take the class together. She also has another friend that is there with her 2 children. We have met previously on a couple occasions. She has a 1 year old son who's in Nelsons class and a 4 year old daughter who takes lessons with an instructor at the same time we're in our class.
After the lessons we were getting rinsed off in the locker room and her 4 year old daughter kept touching Nelsons hand. She rubbed it several times and smiled really big. She followed the rubbing with a scratch on Nelsons hand which didn't seem to bother Nelson. I asked her if she liked Nelson. She said "well it's like she's covered in mud!" She smiled so big and then kissed her on the hand. It was very sweet and very cute. I love what kids have to say.