Brother keeps touching his dick?

He's really idiotic. He has never been good at anything but thinks he's is extremely intelligent and smart. He has received average marks in all his courses yet he thinks he has a very analytical brain and laughs at most people. He thinks my mom and I are dumb and I can't achieve anything so he's the only one who can make my parents proud.

He doesn't brush his teeth properly, only takes 1 min to brush his teeth, doesn't clean his tongue, showers in 5 minutes and has no sense of hygiene. He is also overweight but now he's working on losing weight though.
He doesn't take care of his appearance at all. And the worst is he keeps pressing his dick all the time in front of everyone and most of he time he's touching it.

What is his problem? He's 23.
Brother keeps touching his dick?
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