Let's define what a kiss is. A kiss is a touch with the lips as a sign of love, sexual desire, reverence, or greeting. When does a toddler become knowledgeable about these emotions. We are all born with emotions, but not all those emotions are pre-wired into our brains. Kids are born with emotional reactions such as crying, frustration, hunger and pain. But they learn about other emotions as they grow older such as being loved. The interpretation and understanding of how love is supplied and by whom is the responsibility of the parent.

A kiss on the lips for many toddlers can mean kicks and giggles according to the environment they are in whether with playful and loving parent(s) or conservative parent(s). The question is, when should the father stop kissing a son in the mouth or should he do it at all. I feel based upon empirical studies, received by means of the senses, particularly by observation and documenting patterns and behavior through experimentation, it depends on two things; age and character. What I mean by character, is a child for instance that is ill-prepared to cope with life's challenges, can be misguided by affection from his father?

Once again it depends on the child. But my summation is, after the age of 5, a father should cease all lip contact to establish male to male boundaries. To establish those boundaries it has nothing to do with giving a forehand or cheek kiss but a lip kiss should be absolved around the boy's age of 5 years old. At the age of six I started becoming aware of my sexuality and the interpretation of a kiss was love, something I didn't quite understand but felt it as a high emotion of love being kissed on the lips by my mother but by my father it would have had no meaning of love but greetings. So, my theory is, a father should cease kissing a son on the lips according to his age and character after 5 years old.