I think it was Greece and I'm like 98% sure that the penises were all of a normal size, like the modal size for penises, and people just have no idea how big penises are any more because dick wiggling has fallen out of favor as a form of cultural celebration.
Had more to do with what the statue depicted. The greeks were more interested in showing a idealised human form, genitals were considered the least interesting part, ergo the mal statues had small dicks and balls and the female ones had innies.
The focus was on the face, muscles, body shape and so on.
In other areas they had zero problems with showing big dongs. Satyr pics always go wild.
The Romans had a big dicked god responsible for guarding the home. He was always depicted with a huge erection, as he would rape any burglars.
History is just rad. People are just people through all time.
The romans also had so called trivia boards, were everyone could write shit on. Like "Looking for X, offering Y", "Want to buy Z". These boards contained the finest shitposts, Brothel ratings, coming out statements and Tons of dick jokes.
Also: Graffiti is old as fuck. Egyptian temples are full of scribbles going back milenia. My are the 3 gallic madlads who climbed a pillar to write "Agamonos to Cabalos to Torq asubio." on top, "Agamonos, Cabalos and Torq were here."
Yeah I think it was Greece. Also they were big foreskin fans and thought it was rude to have an exposed glans. They used string to tie their dicks when naked in public to stay decent (kynodesme).
I also vaguely remember something about some kind of wire tying operation that stage actors back then would get to keep them flaccid at all times, to be dramaturgically correct or something. I might be wrong though