On the DVD he was touching his neck, kind of pulling at the skin near his collarbone as he had been sick.
He seemes flabbergasted at his behaviour and even remarked "I keep touching my neck although it's not going to make me get better" or something along those lines...
As he has OCD, I wouldn't be surprised if it has now turned into a facial habit or tic.
But, of course, it is very cute.