Men I Tell Ya!

First, the good news....my brother doesn't have cancer!  Yet.  They said that the mass on his lungs looked like nothing to worry about, but he has to go back for regular scans and if it grows or changes in any way they slice him open.
 
Second....I swear, do men hit peak maturity at 7?!?!?  Sometimes Joey can get under my skin so easily, and so thouroughly, that I want to club him over the head.  He acts like he's a kid, and even when I ask him to stop he laughs like it's funny.  But he gets me so worked up that I feel the urge to laugh and the urge to cry welling up and battling in my chest to see who win's the escape.
Like tonight...He was eating ice cream, and like savages, we don't usually use bowls.  Just a spoon and the tub.  So when he's done he asks if I want some.  I reply, no thank you.  So he says 'why?'.  Me-'I just don't feel like ice cream right now'.  Him-'why?'  Me-'just because' Him-'Why?' and onwards until I stop talking to him.  Then he gets all giddy. 
Or, also tonight, I'm planning a suprise for his birthday, and his sister was texting me about it and he goes 'who ya talkin to?'  so I tell him his sister and he says 'about what?'.  I know he won't shut up unless I tell him so I told him we were discussing his birthday.   And then the why's start again. 
It drives me freaking nuts, and he knows it!  And I let it get me so angry, and furusterated that my emotions go into death con 4...like argh!
I think he is a 7 year old trapped in a soon to be 25 year olds body!