When I was about 24 years old I worked at a meat processing plant. The job paid very good and once you were hired most men stayed for many years. These guys were like family, having worked together for so long. I was one of the youngest men there and we were not required of be nude or shower but showers were provided. The lower level employees had our showers and dressing room and the supervisors had their own. WE never saw them naked but they would come into our dressing room quite often so they saw all of us, who showered walking around nude. Some of the men never removed all their clothing and others didn't give a damn and would strip, walk to the showers, bath and return naked.
Nothing sexual but a lot of kidding and remarks about size. Never heard anyone say anything to a man who was small but they would comment and joke about the big ones. I remember one man telling a well hung guy that is he ever broke down in front of his house to keep going. He didn't want to take a chance of his wife seeing one that big LOL. Another man told a guy that his cock was like a catfish. Before he went into the shower it was like a catfish that had been laid out on the bank, all shriveled up, but when he came out it was like the catfish had been put back in water and swole back up LOL Just men bullshitting and trying to be funny.
I never liked getting naked in front of all the guys but I stunk, after a days work, so I grinned and beared it, so to speak LOL
The showers themselves were individual but it was the trip back and forth when you were exposed to everybody. Not to many tried to cover up. They were going to see it at some point in the dressing process anyway so why hide it.