Where will the Love with Big Other A end?
First, I think the film is potentially about the subject made of form and contend, the form being the soul that travels through each body and the contend every changeable body that is exorted of its original soul. There are some rules that governs this intersubjective travel: at the same age and never occuring twice. The subject throws himself into some objective container of which he has no controle. The longer it stays in the body, the more it knows the body and character of the original person. This is the installment of subject, followed by the maturization of subject when the subject will be pushed out of the body or when the subject relieses the body.
Second, the main theme is about love, more between the girl and the big Other, the A. In the Lacanian psychoanalysis, the love is not between two individual persons, but screened in-between by a big Other. And in the film, the real love seems immediate and direct, omitting the Other partner, between the subject and the screening big Other. What is this love like in the film. Still, the love is precipitated by the same chemical element, like the gaze or the hug between common lovers, but it transcends the sexes. Again, what stops the romantic love between subject and the big Other is the common rules set up by the big Other: like the family exclusion, the ambiguity of the chirldren, and also the ethical boundaries. The Real love realised falls back into the same loop set up by the big Other and encounter its death in the womb.