The line about the nipple should be qualified: it's currently thought that face detection is also innate. (though, intriguingly, it's apparently unknown whethe

The line about the nipple should be qualified: it's currently thought that face detection is also innate. (though, intriguingly, it's apparently unknown whether this is because recognizing faces is important specifically for babies, or because the human visual system is evolved to process that kind of thing. i.e. maybe there are other stimuli, not face-shaped, which would also intrigue babies because they push the visual system's buttons: http://journal.frontiersin.org/article/10.3389/fpsyg.2015.00969/full http://journal.frontiersin.org/article/10.3389/fpsyg.2015.00... )