Yah, I think this is a requirement in general. If I could remember what I've done to myself some of those times I would surely not do it again.
That's why, whenever I'm going thru a sufferfest, I tell myself and my partner, "This sux. This really sux. Just remember how much this realllly sux 'cuz next week at the pub we're not going to remember how much this really sucked."