Marriage discrimination struck down in Arkansas.

[Foxaèr]

The rationale reason would be that heterosexual unions generally offer more value to society then homosexual unions.

False. Homosexual unions offer just as much value to society as any heterosexual marriage. So fuck you for devaluing perfectly legitimate homosexual unions that are based on no less love than heterosexual unions.

Imagine if everyone in a society became homosexual.

That is quite the imagination you have, and it is just that. An over imaginative thought that has no basis in reality. Everyone is not going to suddenly become gay, because studies show that the homosexual population has consistently remained around ten percent of the world's entire population.