my 3 year old son (just turned 3 last sept. 11).. i am so worried for he always screaming everytime someone strangers touches him pt talks to him. i am confused if sreaming a lot for a boy like him is normal?if someone calls his name that is stranger he always screams and mad. kids around us do not behave like this and that makes me wonder...is this normal?why do other kids dont behave like this?pls enlighten me.. thank you so much. ur help is greatly appreciated..