He hates having messy hands. With the exception of sand, he can't bear to have substances spread all over them and always wants to wash them off. Today we made Easter cards involving cotton buds and sponge printing, naturally his hands got dirty. I wouldn't let him wash his hands, in fact I got the sponge and painted it all over mine and then encouraged him to do the same. The next fifteen minutes were spent painting our hands, squelching them and smearing it all over the paper. I think he might be a little bit cured.