As someone with clinically-diagnosed "severe ADHD" I use that language all the time. I want to do something. My mind won't let me.
It really is like a devil on my shoulder sometimes.
"I want to read a book."
"No."
"Really! It's good! We've done this be-"
"No. Look, shiny!"
"Neat! Now, the book..."
"No. We're going to watch a show now."
Sigh.