Is heteronormativity a natural complex of the human being?

Firstly, here is the wiki article on the term: http://en.m.wikipedia.org/wiki/Heteronormativity

Secondly, what are everyone’s thoughts? Do you think that this idea is accurate or healthy? What is your personal experience regarding the concept? I’m looking to obtain a larger scope of understanding regarding the matter and would like to understand different viewpoints regarding it as well.