Your problem is that you don't even fully read my reply before you start writing another one z.z Read my reply to Adam.Because I think that you live behind the moon and need it.
Like Adam said above, it is not like bisexual (or gay and transgender) people are just running around, drooling like a hungry dog whenever they see an attractive person. And even if it was the case, it would be only weird for bisexuals to you? Not if a hetero person does the same when jumping from bed to bed?