That may get better with age. At some point in my life I stopped having the cycles to care as much about such things. Plenty of people look weird in life, many weirder than you, your value as a person is far higher than how your physique compares to a model. Shared facilities are just functional tools, get in, do ur thing, get out, done.
I think this is also simply a thing of familiarization. It seems daunting at first, but at the end of the day the others are humans as well, have their flaws and don't have anything on either. Once you're used to communal showers or saunas it ceases to be a big deal, or at least it was for me.
