Bisexuality appears to be too complicated for popular culture.
So many books, TV shows, films and more show 'straight' characters turning 'gay' or even 'gays and lesbians' going straight.
It never seems to cross the creators' minds all these people may be bisexual to start off with.
Why is that? Is it because pop culture is supposed to be simple, easier to deal with concepts like black or white, male or female, gay or straight?
Or is it that they just don't get bisexuals exist?