If homosexuality is “normal” and it is “wrong” to deny someone the right to act on their baser instincts, then bisexual people should be allowed one spouse of each gender. Otherwise the homosexuals are requiring the bisexuals to deny half of their own identity.
There’s no logic at all to their positions.
And what is civilization anyway but a way to harness and redirect certain impulses? If the idea is for anyone to do whatever they like, then maybe even toilet training goes too far! I wouldn’t be surprised to see a war on that next.