Hi my son is 15 months old.....I adore him hes my first child and spoilt rotten. he is now 15 months old and understands alot of things like ...dummy, bot bot, nite nites etc etc but when it comes to "NO" i believe he just chooses not to listen. He was such a wonderful quiet well behaved perfect baby but now as much as i love and adore him hes turned into a little terror! he has this thing where he likes to hit and head butt! i tell him NO and he laughs and does it again. this just goes on and on until i have to shout at him (which i hate doing but he wont listen to me)has anyone else had any experience like this and how do you deal with it ? will he ever listen to me or is he just to young?