Bisexual
From wipipedia.org
Being sexually attracted to members of both sexes. Sometimes described as getting the best of both worlds.
Bisexuality is common. Some people like to deny they have any attraction to the same sex but raving homophobes are usually just in that river that runs through Egypt. you know the one. Denial!
Anne Rice novels "normalise" bisexuality, especially the Sleeping Beauty trilogy.
See the wikipedia artcile on bisexuality for more information.