Why So Many Zombie Brides?

I've been noticing that I'm seeing a lot of wedding dresses on Zombies, so I checked the JSON; and unless I'm reading data/json/monsterdrops/zombie_default.json wrong, 5% of zombies (or 10% of female zombies) spawn with wedding dresses, and debug spawning a few large groups of zombies shows around that number.

My inclination is to change this to 1%, which is a nice simple change, but is there some lore reason for this that I'm missing? (Did the a significant portion of the population go insane in a way that made wearing wedding dresses seem like a good idea?)

While I was checking it I also noticed Cassocks, Thawbs, and Haori seem to be way to common as well, which again is a simple fix.

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Some back of the envelope calculations:

In the US there is 2.5m weddings a year apparently, or ~1.7% of the population (each wedding has two people), so around 0.005% of the population gets married any day. Even allowing for the wedding rate in mid-Spring to be double the average we're still looking at about 1000 times more zombie brides than is realistic.

Of course my suggested number of 1% is still way to high to be realistic, but it's at least not so egregious.

Cassocks:

There's about 40,000 Catholic priests in the US; we can double that to include various Monks, Orthodox, and smaller denominations, and we get 0.025% of the population that we could realistically expect to wear a Cassock, but we see them on around 2.5% of zombies, or about 100x more than we should get.

And I suspect Thawbs and Haori would be much rarer than Cassocks as well.