Well. I think everyone ish Bisexual in a way. Sure straight guys like girls, and vis versa, but you can't say, you've ever not said a person of the same s* was hot. Or something. And really who cares. Its a song. Maybe she got bored and wanted to spice things up. Xd
I, personaly am Bi, and I like the song. Its my new fave. Maybe Katy has a secret, maybe shes Bi too. Never know do we. So. Really, just, Live with it, Love it, Learn from it. ; D