TIL that in Japan, they have a thing called "nagashi somen", which are restaurants with flowing troughs of water where noodles slide down and you have to catch them
TIL that in Japan, they have a thing called "nagashi somen", which are restaurants with flowing troughs of water where noodles slide down and you have to catch them

Nagashi Somen: Where to Eat Flowing Noodles Near Tokyo | Tokyo Cheapo

I think it's a combination of the 'we use this trough for everyone all day' and the fact that the name is really similar to 'semen,' but this sounds highly unappealing.
It is unappealing. I would not eat at a place like that. Some do have separate chopsticks for catching the somen (long o, so probably sounds less like semen than you might think), but it's still not great. I have seen it at family events as well.
apparently the noodles are served cold and that sounds awful as well
You just made it seem much more appealing.
The noodles just slide down your throat.