i picked him up to cuddle him him and he sunk his teeth into my shoulder!hes never done it before,infact hes never been violent in anyway ever,even when others 2 year olds were doing whole hitting biting thing.do you think hes seen it at school?he wont tell me why he did it.i put him down and told him off,telling him it was naughty thing to do and asked why he did it.i thought at 5 he is old enough to know it would hurt and is wrong!