Let X be an action, such that to X is morally forbidden, but not because Xing is intrinsically evil but rather because there is a high probability of harm to others and/or to self were one to X. In fact, let us assume that there is nothing evil per se at all in Xing. There might even be near possible worlds in which Xing would not be evil at all. That is, X is extrinsically, but not intrinsically evil. In addition, Xing is enjoyable.
Is it morally wrong to revel in thoughts of Xing? If so, why? Is it merely because one could not morally X?