Pinching seems to be something Xan is doing at the moment. He has cut back, which is a good thing.
One of the werider things he did was hit himself in the head when he was being told off. This has since diminished a bit, since he is on sabbatical from creche as I am on a term time contract. Hopefully like his head banging, it will stop completely. I think they pick up things from ther kids. He's been much mellower since not attending creche. Unfortunately, he will be going back in September, and goodness knows what he will pick up again.