Jealousy. Trolls hide under bridges most of the time. Only on occasion do they venture out to see the sun and the sights and the men of the daylight world. Only then, and with great caution. For although Trolls are much stronger than men, They are also much more fragile, more easily hurt by the sorts of barbs men throw about like darts, when the game is hot and the beer is cheap. More easily shaken, stricken - by the sorts of statements men can make without compassion because they believe themselves more blessed (at least in their own minds).
