Let's talk about the most used phrase I have ever heard to this date coming from the lips of women. "Why don't men act like grownups instead of children?"
Good question! However did you stop and take a good look in the mirror lately to see if you turned into your mother, because chances are you did, and with that in mind let's have a look.

I've been married twice, involved in three serious relationships and that same question ran through my mind with all of those men, including my current spouse. Males are just not meant to be understood, if they were we wouldn't need them for anything really, we could do it all on our own.
Biology has set it up to make them with those differences along with the male brain thinks in a separate pattern from the female brain, and is why us ladies view males as childish.
I never had a son so I have no idea about raising a male, but I'm pretty sure no mother ever said to her son growing up, I hope you grow all the way into a man and stop being a child, so women you meet in your life won't whine about it. Haha! Or how many fathers do you think taught their son the fine art of "how to remain a child and never grow up so women will go ape shit over it". Never!

I think of it like this, those guys we tried so hard to catch their attention probably laughed at our ridiculous antics when they were watching us already from that "first sight" thing going on. Females can be very childish and yet we refuse to allow the males to ever be such. Perhaps the reason the guys are seen as complete babies is we are so focused on something that we need to relax and just "chill" so to speak.

Personally I have never grown up, I refuse to and made sure that I would never forget what it's like to be a kid. I've stayed pretty close to that and still to this day can not resist doing "childish" things like singing nursery rhymes, coloring in color books, skipping in public, dancing around water fountains, riding stick ponies in the stores, and my favorite sword fights with the brooms. Guys do their "childish" antics in other ways, hobbies, hanging out with their guy friends, going to a spot they've gone to for years (without you), relaxing in their underwear, and sometimes they forget to pay attention to something else that is important to the female. They don't mean to do it, it just happens that way. That silly childish man is actually doing things for you in other ways, that often go unnoticed because you want him to be just like you want him to be.
Sorry sister, if you want that kind of man, bake some gingerbread cookies and bark orders at them all day, see where that gets you.

Yes we go though odd phases with these men in our lives, relationship or work related, sometimes the friends, and when things balance out again, which they usually do unless someone is mental (as in they need to see a dr to get that worked out again by medication), you can maintain what you have with them. Interesting how we find some things funny from certain men and if our own does it we think omg he's being so childish.

I remember how my dad blew off steam when I was growing up. He had a serious side to him, but more often I saw the comical side of him which seemed to just drive my mom to telling him "you're being stupid, cut that out". It made me giggle, but irritated her and made me wonder as I was growing up why something seen as a gesture of good humor is viewed as obnoxious. Even little boys were seen that way sometimes at school with their spit balls, throwing pencils to stick in the ceiling tiles, and that weird eyelid thing they did, and of course the infamous armpit farting. Those of us girls that weren't afraid to be seen doing those same things joined in, but as we grow up that same type of behavior is seen as childish and makes the female insist he stop immediately or else.

To every guy who enjoys being that little boy inside, bravo for you, it means you're still intact with the imagination side of you, or as they put it from a fairy tale, you live in never never land and it's not such a bad place to be. In my opinion this is keeping you from becoming angry and bitter at things that throw a curve at you when you thought the pathway was straight.
To every female who keeps blowing up at the guy she dates or marries about how childish he is, take a hard look at your life and how much are you investing in being comfortable and happy, instead of being miserable and always playing by the rule books.

Serious is for work, play is for life, don't get them confused. Let those boys be boys, even if their toys cost alot of money. That right there is a whole other story on prices we are willing to compromise over for enjoyment factor.