> It just seems like a logical conclusion without any intrigue to me Dunno. Most buttons I've seen on a toilet was 1. Flush. The really fancy ones have a split

> It just seems like a logical conclusion without any intrigue to me Dunno. Most buttons I've seen on a toilet was 1. Flush. The really fancy ones have a split button for "small flush" and "big flush". The thought that toilets are complex enough to even consider talking about standardization is, I think, completely alien to anyone outside Japan/Asia.