If anyone has ever tried pushing two strong magnets together at the spots where the same poles are facing one another, where the magnets repel instead of attract, they can understand a bit about what its like to try and focus on something that isn't very stimulating on ADHD.

Each time you try, just as you get close, they slide off one another and all around, until they stick at a different spot. Those sticky spots, are all the very stimulating tasks.