I wish my skull was a semipermeable membrane.

Because then, instead of spending my precious waking hours reading and studying and whatnot, I could just put lots of books under my pillow before I went to bed at night. And then, as I slept peacefully, knowledge would just seep into my brain, because there's a lower concentration of knowledge in there than in the books. Yep, that would be pretty sweet. Like Sugar Daddy's. Which are delicious, by the way.