seriously what happens if u do look down
I can imagine if one man looked down at another man's "special area" while he was peeing it would be awkward/uncomfortable.
In regards to women going to the rest room together. We usually just go in to fix our hair,clothes,check ourselves, and talk to one another.
Even if we do use the restrooms it's not like we'd see anything! Unlike men who have urinals and then stalls for
other situations we just have the stalls. U_U
(As far as the U.S. goes, not sure about other countries)
On topic: It was just a bit of a waste of space to me, I wanted to see more progress in the story line. I do understand it was made to show that there were other Zetsu clones but, meh...