sharp, stop deluding yourself. You know the answer to this already. They never grow up. But so long as he stays devoted to you, fathers your children and puts bread on the table then you're doing better than most!!
where do you get all these rules from?
is there a template or something for each age?
everyone is different so why try to put your own views on other people?
he is him and presumably thats what you love - if you are expecting him to wake up one morning and be diferent you will have along wait and be disappointed
instead of trying to force a square peg in a round hole, you may have to realise that unless you can accept him for him, he may not be the man for you.