My brother in law has the habit of kissing his 5 yr old son on the lips, for instance, when the boy is watching TV (with lips partly open due to being concentrated), but not only in a peck like manner. He actually places his lips around his son's mouth and does a sucking like movement. I feel this is wrong but need some opinions. I heard that this is the age where a child is forming his psychosexual structure and that this type of behaviour confuses him. His wife will notice this but will look away and ignore it
