Knights who have never consorted with a foocubus have a permanent +1 intrinsic increase damage bonus, which they lose when they do consort with one, with the goal of it being something that is not a huge difference to lose, but does add up over the long run, and which will not stop pacifist knights from using foocubi to achieve the Quest level. This is based on Lancelot and Galahad in Arthurian legend.