梵網經菩薩戒本疏 3.7

3.7

四、具緣成犯者，通緣如前應知。別緣准論亦有七：一、是有情類，以木等無犯重故，死屍未壞等是情類攝故。問：此中何故不同前二戒，有簡異自身立他緣耶？答：以自盜不成盜，自婬即成婬。如律中弱脊自婬成重等，是故不同也。二、是正境，謂女三、男二等，以餘處不犯重故。三、起彼想，謂以迷生為木，及迷道為非道，皆不犯重故。四、有婬心，以睡眠等不犯故。五、有三毒，以在家菩薩正慧御心方便化生，開不犯故。若約出家不開，則無此緣。六、造趣，以不動身儀不成重故。七、與境合，謂入如毛頭等。若為怨逼，開與境合，禁其受樂。

Fourth, regarding the fulfillment of conditions to constitute an offense: the general conditions should be understood as previously explained. The specific conditions, based on the treatises, also comprise seven: 1. It is a sentient being, because with wood and the like there is no major offense, while an undecayed corpse and the like are subsumed under sentient beings. Question: Why is this precept different from the preceding two precepts in not distinguishing one's own body to establish [only] external objects? Answer: Because stealing from oneself does not constitute theft, whereas sexually engaging with oneself does constitute sexual misconduct. As in the Vinaya, where one with a flexible spine sexually engages with oneself and commits a major offense, and so on; therefore it is not the same. 2. It is an appropriate locus, namely the three [orifices] of a woman, the two of a man, and so on, because other places do not constitute a major offense. 3. Arising the perception thereof, because mistaking a sentient being for wood or mistaking a proper orifice for an improper place both do not constitute a major offense. 4. Having a lustful mind, because during sleep and the like there is no offense. 5. Having the three poisons, because when a householder bodhisattva uses correct wisdom to govern the mind and employ skillful means to transform sentient beings, an exception is permitted and it is not an offense. If considered for the monastic, for whom no exception is permitted, then this condition does not apply. 6. Making an approach, because without moving the bodily posture a major offense is not constituted. 7. Uniting with the locus, namely entering as little as the tip of a hair. If coerced by an enemy, uniting with the locus is permitted as an exception, but one is prohibited from experiencing pleasure.