Yes, in the 80's, my coaches would shower with us, use the hot tub, etc. They were often naked with us whenever we were also in the shower and other times. Most coaches are former players and sometimes current players in college or semi-pro. We would lift weights and help with laundry so the team managers did not have to do everything themselves. We did it often just wearing a jock strap or compression shorts (although I did not hear them called that for several years later.
There were boners for embarrassment for them and us. And use boys with, as they say, nothing to be embarrassed about, walking around naked. The weight room, showers, lockers, equip room, hot tub, steam room, sauna, and indoor practice field only had entry from the locker room to keep equipment from disappearing. If an activity could be done naked, then certainly in college, the coaches and players at Baylor were naked.
We played "touch" football, usually in jock straps. All through school, the only things you supplied for yourself were your socks, jock straps, and mouth guard. The managers washed and otherwise cleaned your stuff up for you. They worked hard for no pay! But we would strip off everything else and leave it with them as we came in the locker room, first stop.
Coaches often did the same. No clothing was allowed in the hot tub, steam room, or sauna, only a towel if you wanted one when walking around. The towel thing always seemed stupid since only men were allowed in. Even the coaches would show off for us as we did to each other. It was fun. I always kept my towel wrapped around my neck and shoulders. My head sweats a lot for some reason? Always has.
We did some horsing around and playing grab ass, etc. I believe this was normal for the time. I had lots of buddies who played at other schools, and they generally said the same. College was great because we would sneak beer in, but the coaches ignored it. Against school rules, but we were all above the age (18).
I have the fondest memories of hanging out with them, sitting naked, drinking beer in a hot tub with so many dudes that you were touching someone on almost all sides. I know from my own sons and grandsons that these things are still common once you are in college now.
It is a shame that youth is wasted on the young. From what I see and hear these days.