It's 40-60% genetic depending on which studies you choose to believe, so you could say with a fair degree of accuracy that it's half genetic. The other half is set in stone during early stages of development. By the time you're 15 or so, you are who you are and there's not much you can do about it.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.