Oh wow, Aquinas opining about something he himself had never experienced. I'm sure this has some merit. Let's spend a couple hundred years trying to figure out what he meant, I'm sure we'll get somewhere
I used to think marriage was pointless. Aquinas helped me change my mind about that. And now I am married with two children. But one of those children is older than the marriage is. (Actually both if we count from conception as opposed to from marriage.)