It is to be observed that men derive pleasure from the pains and losses of others, in various ways, without the specific emotion which I distinguish as malevolent affection: either (1) from the sense of power exercised---which explains much of the wanton cruelty of schoolboys, despots, etc.---or (2) from a sense of their own superiority or security in contrast with the failures and struggles of others, or (3) even merely from the excitement sympathetically caused by the manifestation or representation of any strong feeling in others; a real tragedy is interesting in the same way as a fictitious one. But these facts, though psychologically interesting, present no important ethical problems; since no one doubts that pain ought not to be intlicted from such motives as these.

ME Book 3 Chapter 8 Section 1