he should not think of a particular woman, for thinking of a particular woman is a cause of temptation: while thinking of her, Satan may prompt him to contact her, or his heart may become attached to her. But if he thinks of the act in general terms—imagining, for example, that he is having intercourse with a woman—and ejaculation occurs, there is no harm in that. Nevertheless, we advise against exposing oneself to this, because anything that is not natural will most likely bring more harm than benefit.