B"H / Ś"Ś! We humans are strange... Maybe I'm wrong, but I can't think of another creature who (in non-life-threatening situations,) does what she knows will hurt, is wrong, or undesirable, so that it's really only part of her that wants to do it, yet she proceeds with it anyways...
(Youtube Channel Nolan Kido)
Curiosity, addiction, taste, going beyond something... why do we do this? Is this the same behaviour as not resisting telling a lie, for instance? Is the calculation simply about receiving instant desire satisfaction, vs. receiving a known future pain? Is this because we're mostly, naturally optimistic about the future pain we know we should receive?