So should we outlaw any heterosexual union that cannot result in reproduction? Perhaps men and women should have to get fertility tests when they apply for a license. And sorry to anyone who can't; marriage, afterall, is JUST about making kids. But then how do we ensure that all those healthy, straight married couples actually fulfill their duties? The only answer I see is some kind of child mandate. If the couple doesn't have a kid within 3 years, we can just dissolve their union, because they were just abusing it anyway.