While I mostly agree, all you said needs to be balanced out against our human tendency to exploit power relationships, in particular because of the possibly inv

While I mostly agree, all you said needs to be balanced out against our human tendency to exploit power relationships, in particular because of the possibly involved 'inherent violence'. The legal system and many social rules are established to protect the weaker actor in a relationship. With respect to your example of a professor marrying his student: people simply fall in love, and that means occasionally professors fall in love with students, and students with professors. But we shouldn't tolerate a sexual relationship and a professor-student relationship at the same time. So the moment they start the sexual relationship, the couple needs to adjust their professional one (e.g., moving to different universities).