One Track Mind

Sometimes, I'll watch one of my favorite shows or read one of my favorite books, then, when my parents are saying something, I find it impossible to listen because my mind keeps wandering off and thinking about what I just read/watched. I wonder if I should put it on a leash... Anyway, so it can be really annoying, especially when they say "...understand?" because then I have to ask for them to repeat it over again which ticks us both off. It can get frustrating, and has been the cause of more than one yelling match.