....and has done so at intervals for many years.

Why are public toilet seats u-shaped?

I search the internet for this information at least twice a year,
thinking someone must have put this essential bit of "why" out there,
but the best I can find are these two explanations, and neither satisfies:



If I succeed at getting a definitive answer from the Kohler company, I
will post it, 'cause I'm sure y'all are dying to know.