Sorry, Brandye, but I'm going to disagree with you.
I think you are bisexual if you are sexually aroused by both sexes. *After all, you can be gay or straight and never have sex. *It's not all about the act, it's about the emotions involved as well.
To parphrase Jeff Foxworthy:
"If you look at Brad and Angelina and think, 'I'd do them both... together or separately.' then you might be a bisexual."