Yes, okay, so:

So what they're saying is:

- all straight couples who do get married are automatically "stable" (because people never get married for the wrong reasons)
- all gay couples who choose to have a child through various means are automatically "stable" (because people never have kids on purpose for the wrong reasons)
- all straight couples who *choose* not to get married are not "stable" and incapable of committing to their kids

...buh?