Why don't males ever grow up?

Why don't males ever grow up? Why do they stay selfish childish little kids forever?
and If they aren't going to grow up why did God instill something in us that makes us want them? I do not want to associate with or be in a relationship with a selfish little kid I deal with enough of those at school. You can look at any male in your life and if you want to put emotions aside and think logically for a minute even the males we love like our dads and brothers are big babies and our sister in laws and mothers which are their wives become their mothers at some point in life. Its actually pretty sad when a woman thinks of marriage you think of having a family and having someone to take care and support you but instead you end up taking care of a big huge selfish baby! plus any other kids you might also have. That is so incredibly annoying times like this I wish I liked women too bad I don't! I know that no one is perfect and all that jazz but I seriously believed there was someone perfect for everyone in the world. I'm at a point where I'm starting to believe I'm either the exception to that rule or it is just not true! They are selfish about emotions, physical relationships, hobbies, food, and pretty much everything else that exists. If its not their way or doesn't make them happy then you'll get a mean temper tantrum yes you heard it TEMPER TANTRUM just like a 3 year old. The funny thing about it all is that their first argument every time is I'm not a baby I'm a MAN haha well actually YOU ARE A BABY! So in conclusion All males are babies, they will never grow up, and they are very selfish those are three facts every woman must either accept to be with one or reject and stay single forever! Not sure which one I'm choosing yet which one will you choose?