Hey Karen,
Trust me - it will be difficult to move him at that stage.... I've learnt from other mistakes. Sleep issues are the one's that plague parents the most. Cuddle time's great.... but in the long run it gets difficult for baby to re-adjust as he won't understand why he suddenly needs to be in his own bed.
Munchy x
Well up until the 1900's (and still today in most parts of the world) cosleeping is a normal and necessary part of infant care.
An infant does not understand who his caregivers are, nor does he completely understand what he/she needs to do to get the constant comfort they got in the womb. So when they don't feel comfort, they cry. They may not feel comfort because they are lonelye and want love adn affection, or because they physically don't feel well because of a dirty diaper, upset tummy, or hunger. They do not have the tools at this age to do anything other than cry out and hope someone comes to help them. (Hopefully that one nice lady who I know her voice, and smell.)
As the infant progresses and his or her cries are answered with what is needed by the baby, a trust forms. The baby becomes confident that if I cry certain people will come to love and comfort me. The research shows that as an infant, if this bond was cemented, the child cried less as an older child. He knew how to communicate his needs to his caregivers efficiently as there was good communication between them.
I mention this because the essence of baby coming to the parents bed is to limit crying and facilitate this bond. An infant has absolutely no clue what is going on when they are "left to learn" their place. All they want is comfort.
A baby that is older than three months will certainly feel lonliness and frustration, but a good bond has formed between them and mommy. Now baby has the mental and emotional tools to make a transition to more independence. Its not about avoiding confrontation with the child... it'll happen either way. Its about the timing and making sure the "lesson" is learned without possibly undermining confidence and trust.
Our whole lives as parents will be about making sure the lesson that we're trying to teach our kids is geared toward their developmental level.