I've always thought it's because much of it is counter-intuitive, and so it doesn't work with my brain doing it's normal 'jump 3 steps ahead, yeah, yeah, I get it, get on with it' thing.
Also; tenses e.g. simple present...
Also I always forget to stay on top of the chores and get up when my alarm goes off....
At one point I just gave up and started using Filezilla.