I used to go by bisexual as well. I recognized my attraction to other males, but I never really had any experience with them. It was only until I had physical romantic contact with another male that I realized that what I felt for women was nothing but blood flow, no pleasure.
The term "bisexual bridge" I think is rubbish. I believe those who come out as bi first then gay/lesbian later had little to no physical romance with the same sex to say for sure their sexuality. *Note: I'm not bashing on bisexuals.