But what is certain is that the vaginal reaction is very complex and can be qualified as psychophysiological because it not only concerns the entire nervous system but also depends on the whole situation lived by the subject: it requires profound consent of the individual as a whole; to establish itself, the new erotic cycle launched by the first coitus demands a kind of 'preparation' of the nervous system, the elaboration of a totally new form that has to include the clitoral system as well; it takes a long time to be put in place, and sometimes it never succeeds in being created.