You're however you decide to describe yourself. So many new sexual orientations now could be 'hetero-flexible' or 'homo-curious' or whatever they all are. Ultimately though thoughts don't define our orientations, nor do acts. It's when a person chooses a label to describe themselves that they become that label. I prefer just 'sexual' having gotten tired of all the terms, none of which bind me to them as I can change and have sex with whatever I want as the mood strikes. Also, who and what gay is varies around the world. How it's used in the US does not describe the majority consensus.
Wanna be a heterosexual who digs lesbian porn you can do that. Wanna be bi, can do that too. Nothing binds you to the term though. Close your eyes, and what's pleasuring your button will be unknown, so how would you then define your orientation but simply not doing so?