My son is a freshman in high school and hes befriended a 18 year old male friend. who is buying him expensive gifts often. a long coat and other items. he has never been to my home. I dont have his last name. and my son doesnt say much about him. hes also bought the same kind of coat for another younger boy in high school. could there be something wrong going on here. or is it possible this is normal. why would and older kid be interested in my younger 15 year old son as a friend?