Most of us claim we want to be happy—to have meaningful lives, enjoy ourselves, experience fulfillment, and share love and friendship with other people and maybe other species, like dogs, cats, birds, and whatnot. Strangely enough, however, some people act as if they just want to be miserable, and they succeed remarkably at inviting misery into their lives, even though they get little apparent benefit from it, since being miserable doesn’t help them find lovers and friends, get better jobs, make more money, or go on more interesting vacations. Why do they do this?