[3] "Factors known to contribute strongly to falling in love include proximity, similarity, reciprocity, and physical attractiveness",[4] while at the same time, the process involves a re-activation of old childhood patterns of attachment.
[7] Jungians view the process of falling in love as one of projecting the anima or animus onto the other person, with all the potential for misunderstanding that this can involve.
[7] With regard to sociobiology, it is stressed that mate selection cannot be left to the head alone[10] and must require complex neurochemical support.
[12] Biologist Jeremy Griffith suggests that people fall in love in order to abandon themselves to the dream of an ideal state (being one free of the human condition).
[citation needed] "Sexual desire and love not only show differences but also recruit a striking common set of brain areas that mediate somatosensory integration, reward expectation, and social cognition"[13] Neuroimaging studies show that love and sexual desire share common chemical reactions in the brain.