i dont get the first story

so the guy is bisexual?

was, but now he's found his one. So, I guess straight.

Who? Now I'm confused. The brother was always straight. The other guy was always bisexual and still is. If the fact that either of them are with girls changed their sexual orientation then there would be no reason for gays to have the right to marry, since they would already have the right to marry without legalizing gay marriage, so maybe you can understand WHY I'm confused, now?