@Coffeecrumblecake It is cute, yes. My sims get married, too, but usually for other reasons than just because they could or wanted to. My current sims are married for story reasons.
With that said - you're completely right. Soulmate aspirations is very powerful.
The fact that I've completely forgotten about it despite that one of my sims is actually completing it says something, doesn't it? :)
About IRL - never will get married, never will have kids. :)