I was wondering, whilst reading Mark 1:41, why Jesus touched the leper given that touching a leper made someone unclean according to the Old Testament law. As the leper was healed in that instant, it would be difficult to argue that Jesus became unclean.
However, I began to wonder whether, with mankind, when we touch unclean objects we become unclean (sin pollutes) but with Jesus, when he comes into contact with unclean objects, they always become clean (cf Mk 5:28-29). I was going to skim through the gospels to look for other possible examples to support/contradict this idea, but wondered whether there might be a clever Logos way to do it as well and, as I thought it was an interesting proposition, I thought others might be interested in thinking about it too. 
Blessings,
Paul