First, I'm not saying that it never happens. I'm more talking about what society at large does, not what 2-3% of what people do. And second, I'm excluding sugar daddy relationships.

So for everyone else, is it just a myth? I'd say close to 100% of typical normal pretty girls seem to be with ordinary guys who just happen to be good looking. I mean you can even go on Instagram and easily see that it's pretty much nonexistent to find an attractive girl who is with an average looking guy who happens to be the doctor/lawyer/ high earning businessman type. But I'd say I've found it even more rare in real life.

Hence I personally think it's largely a myth. Not to mention most 1st time married people meet by mid 20s at the latest (avg age of marriage being late 20s) or sooner. So even the numbers don't support the theory.