A clean toddler?

I've been noticing a funny habit of my little boy: he really likes to be clean. When he is eating something messy (which he mostly does with his fingers), he'll often hold out his hands to me once or twice during the meal because he wants them wiped clean. Today we went to the park and he fell down on the damp sand, and "complained" to me that it was on his hands. I was sitting on a bench about 10 feet away, and instead of pushing himself back to standing, he dragged his knees all the way through the sand to me and used my legs as a prop to pull himself up. All to avoid putting his hands back in the sand, at least in my thinking. Oh, and when he finally stood up and saw that the toes of his shoes were covered in sand, he pointed and whimpered. Just once, and then he went back to playing.