r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.
For what it's worth, Eliezer's answer to your second question is here:
Is that true? Why can't the wish point at what it wants (e.g. the wishes of particular human X) - rather than spelling it out in detail?