Instinct by nature is natural (it's an oxymoron to speak of an "unnatural instinct"). The real question is how you qualify what constitutes an instinct.
https://en.wikipedia.org/wiki/Instinct
Instinct by nature is natural (it's an oxymoron to speak of an "unnatural instinct"). The real question is how you qualify what constitutes an instinct.
https://en.wikipedia.org/wiki/Instinct