conuly

In GoF, we find out that he's got a fair level of natural resistance to Imperius, which he strengthens considerably in just three easy lessons (and why *did* Crouch bother actually teaching him to resist this curse? Wasn't that counterproductive to his ultimate goal? Would he have been unveiled so easily if he hadn't?). The implication is that he's not very prone to outright magical manipulation. Anybody wanting to mess with his mind has to resort to some trickery, as they do in OotP, convincing him that Sirius is dead.

Skip ahead to book 6. The luck potion works, apparently, like Imperius - it tells you what to do, and you do it. And he doesn't even question it! Why is this?

And does the luck potion give you what you *want* or what you *need*? For example, let's say that using this potion before a Quidditch game and getting caught will land you in deep trouble with the wizarding mob. But you're stupid, so you do it anyway. Would the luck potion help you (or your team) win the game, or would it help you save your damn skin? Or does it go for broke, and both help you win the game *and* keep the mob from finding out what you did, by somehow eliminating the evidence even after it's worn off?